Information
                
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 Patent Grant
                     
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 6330856
                     
                
             
         
    
    
        
            
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Patent Number
                    6,330,856
                 
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Date Filed
                    Thursday, January 28, 199926 years ago
                 
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Date Issued
                    Tuesday, December 18, 200123 years ago
                 
            
         
     
    
        
            
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Inventors
        
                 
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Original Assignees
        
                 
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Examiners
            
                            Agents
        
                 
            
         
     
    
        
            
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CPC
        
                 
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US Classifications
        
                            Field of Search
        
                US
 
                    - 100 52
 
                    - 100 99
 
                    - 100 229 A
 
                    - 100 102
 
                    - 100 233
 
                    - 221 102
 
                    - 221 135
 
                    - 232 1 B
 
                    - 232 433
 
                    - 312 211
 
                    - 312 224
 
                    - 312 327
 
                    - 312 328
 
                    
                 
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International Classifications
        
                 
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        Abstract
An apparatus and method for dispensing and retrieving garments in a controlled manner. The apparatus retrieves the garments in a secure enclosure while accounting for the garments returned, and compacts the returned garments, all with a single, stand-alone apparatus. A paddle mechanism sweeps the garments into a horizontally extended storage compartment and compacts them with an upward movement. The paddle is articulated at a one-way joint to allow it to pass obstructions on its return path.             
         
        
            
                    Description
  
    
      
        TECHNICAL FIELD
      
    
    
      
        The present invention relates to a system for dispensing and retrieving garments, and particularly relates to dispensing garments in a controlled manner, receiving the garments in a secure enclosure while accounting for the garments returned, and compacting the returned garments, all with a single, stand-alone apparatus.
      
    
    
      
        BACKGROUND ART
      
    
    
      
        Some employers must provide special clothing to their employees, then collect and launder the clothing when it becomes soiled. Hospital scrubsuits are an example of such clothing. A problem associated with the use of scrubsuits is loss of inventory as a result of negligence, misuse and theft. Another problem is extra laundering of unused scrubsuits as a result of mishandling.
      
    
    
      
        To avoid the labor costs and other disadvantages of staffed dispensing stations within a hospital, vending machines have been developed, such as that shown in U.S. Pat. No. 5,638,985. This apparatus effectively solves the problems involved in vending flexible cloth items one at a time. The dispenser includes a processor that tracks the inventory within the machine as scrubsuits are removed, and limits users to a maximum number of withdrawals with a magnetic card or “PIN” number access system.
      
    
    
      
        The clothing collection apparatus shown in U.S. Pat. Nos. 5,713,270 and 5,829,349 also reduces inventory loss. Scrubsuits are checked in by the user, and a processor sends a credit to the user's account via a communications network. Thus, the return of a scrubsuit increases the scrubsuits available to that user from a scrubsuit vending machine also linked to the network. The apparatus also compacts the garments that are returned.
      
    
    
      
        In large hospitals, placing individual dispenser units and receiving units at key locations has proved effective in controlling an inventory of scrubsuits. However, a system of separate dispensers and receiving units connected by a communications network may be too expensive for small hospitals, clinics, or hospital departments that need to maintain an inventory of scrubsuits independent of a large hospital organization. Thus, there is a need for a compact unit that can dispense and retrieve garments such as hospital scrubsuits.
      
    
    
      
        Adapting the garment receiving apparatus of the unit shown in U.S. Pat. Nos. 5,713,270 and 5,829,349 into a compact unit presents difficulties, because the collection compartment into which the garments are compacted is located directly below the compacting mechanism. Thus, the volume of clothing that the collection area can hold is limited by the height and width of the unit. To increase the capacity of a garment collection compartment, a compaction system is needed that can move and compact garments into a laterally extending collection compartment.
      
    
    
      
        SUMMARY OF THE INVENTION
      
    
    
      
        The present invention seeks to provide an apparatus that can receive and pack goods, such as garments or the like, laterally with respect to their intake location.
      
    
    
      
        This object is accomplished by providing an apparatus for receiving and packing goods, comprising a storage chamber including an outer wall defining an inlet opening, and an inlet chamber positioned adjacent to the storage chamber and communicating with the inlet opening. An articulated paddle is mounted for rotation about a pivot axis, the paddle being positioned at least partly within the inlet chamber and defining a one-way folding joint at a location between the pivot axis and an outer end of the paddle. A drive mechanism is connected to rotate the paddle in both directions about the pivot axis from an initial position at least partly within the inlet chamber toward the storage chamber and back to the initial position. The joint holds the paddle in an extended configuration against resistance when the paddle is rotating toward the storage chamber, and allows the paddle to fold when the paddle is rotating back toward the initial position.
      
    
    
      
        In one embodiment, the drive mechanism is capable of rotating the paddle into the storage chamber. The initial position of the paddle may lie in a plane adjacent to a wall of the inlet chamber, and the drive mechanism may be capable of rotating the paddle into the storage chamber and through an angle greater than 210° (preferably about 220-225° or more) from the initial position. The apparatus may include a resistance sensor operative to reverse rotation of the paddle toward the storage chamber responsive to the paddle encountering a preset level of resistance from goods in the storage chamber. A first position sensor may be located along the rotation of the paddle at an angle indicating the storage chamber is full; and a controller may be connected to the first position sensor and generate a full signal in response to the paddle being reversed by the resistance sensor prior to reaching the first position sensor.
      
    
    
      
        Preferably, the drive mechanism includes a motor coupled to rotate the paddle, and the apparatus further includes a second position sensor located along the rotation of the paddle at a predetermined angle from the initial position of the paddle. In this case the controller is connected to the second position sensor and disconnects energy to the motor in response to the second position sensor indicating passing of the paddle during return motion of the paddle toward the initial position, allowing the paddle to coast into the initial position.
      
    
    
      
        The storage chamber may include a bag and the inlet chamber may comprise a chute positioned above the inlet opening of the bag. The bag may extend horizontally from the inlet opening. The inlet chamber can be equipped with a lockable receiving door, an input device for acquiring user identification information, and a controller operatively connected to unlock the door and to operate the drive mechanism in response to information received from the input device. Preferably, a sensor is positioned to provide a confirmation signal to the controller indicating the presence of goods in the inlet chamber. The controller updates an inventory of goods and an account of a particular user associated with the information received from the input device in response to the confirmation signal.
      
    
    
      
        The present invention also provides a method for receiving and packing goods, comprising the steps of accepting goods into an inlet chamber; operating a sweep arm from an initial position through an angle of up to about 220° or more to sweep the goods from the inlet chamber into a storage chamber having an inlet opening communicating with the inlet chamber; monitoring movement of the sweep arm past at least first and second locations distant from the initial position; returning the sweep arm toward the initial position responsive to resistance to continued movement thereof at any angle from the initial position; allowing the sweep arm to coast back to the initial position from the first location; and if the sweep arm returns without passing the second location, terminating acceptance of goods into the inlet chamber. The step of operating the sweep aim to pack the goods may optionally be initiated less than upon every acceptance of goods into the inlet chamber for a predetermined number of acceptance cycles, to reduce the average cycle time for users, and thereafter the sweep arm may be operated after every acceptance to assure that the inlet chamber is cleared and the goods are properly packed.
      
    
    
      
        The present invention also seeks to provide a compact unit that both dispenses and receives cloth items.
      
    
    
      
        This object is accomplished by providing an apparatus for dispensing and receiving goods, comprising: a cabinet; a dispensing device for cloth items positioned in an upper portion of the cabinet; a receiving chamber positioned adjacent to the dispensing device in the upper portion of the cabinet and including an opening through which cloth items may be inserted into the receiving chamber; a storage chamber positioned in a lower portion of the cabinet and extending beneath both the receiving chamber and the dispensing device, the storage chamber defining an opening communicating with the receiving chamber; and a sweeping arm operative to move cloth items to a portion of the storage chamber beneath the dispensing device. In a preferred embodiment, the sweeping aim moves between a position within the receiving chamber to a position within the storage chamber.
      
    
    
      
        Other objects, features and advantages of the present invention will become apparent upon reviewing the following detailed description of an embodiment of the invention, when taken in conjunction with the drawings and the appended claims.
      
    
  
  
    
      
        BRIEF DESCRIPTION OF THE DRAWINGS
      
    
    
      
        
          FIG. 1
        
         is a front plan view of a garment dispensing and retrieving apparatus embodying the present invention.
      
    
    
      
        
          FIG. 2
        
         is a pictorial view of the apparatus of FIG. I showing interior components.
      
    
    
      
        
          FIG. 3
        
         is a partial front plan view of the apparatus of 
        
          FIG. 1
        
         with doors removed to show interior detail.
      
    
    
      
        
          FIG. 4
        
         is a diagrammatic front view of the paddle and drive mechanism showing various positions of the paddle.
      
    
    
      
        
          FIG. 5
        
         is a block diagram of a control circuit for operating the apparatus of FIG. 
        
          
            1
          
        
        .
      
    
    
      
        
          FIG. 6
        
         is a logic flow diagram of the steps in the operation of the apparatus of FIG. 
        
          
            1
          
        
        .
      
    
  
  
    
      
        DETAILED DESCRIPTION
      
    
    
      
        Referring now in more detail to the drawings, in which like numerals refer to like parts throughout the several views, 
        
          FIG. 1
        
         shows a garment dispensing and retrieving machine 
        
          
            10
          
        
         embodying the present invention. The machine 
        
          
            10
          
        
         is contained within a cabinet 
        
          
            12
          
        
         which holds both a dispensing mechanism 
        
          
            14
          
        
         for dispensing garments or sets of garments, and a retrieving mechanism 
        
          
            16
          
        
         for receiving garments returned by users. The retrieving mechanism 
        
          
            16
          
        
         directs the returned garments into a storage compartment 
        
          
            18
          
        
        . Users and attendants operate the machine 
        
          
            10
          
        
         via a controller interface panel 
        
          
            20
          
        
        , which contains input devices described below connected to electronic devices associated with the panel 
        
          
            20
          
        
         and in an electronics compartment 
        
          
            22
          
        
        , including a programmed microprocessor 
        
          
            35
          
        
         in the compartment 
        
          
            22
          
        
         and a programmed microprocessor 
        
          
            36
          
        
         with the panel 
        
          
            20
          
        
         (FIGS. 
        
          
            2
          
        
         and 
        
          
            5
          
        
        ). A portion of the storage compartment 
        
          
            18
          
        
         extends under the dispensing mechanism 
        
          
            14
          
        
        , as shown in FIG. 
        
          
            1
          
        
        .
      
    
    
      
        The dispensing mechanism 
        
          
            14
          
        
         is of the type shown in U.S. Pat. No. 5,638,985. Because the mechanism is described in detail in that patent, its structure and operation will be summarized briefly here. Referring to 
        
          FIGS. 1 and 2
        
        , the dispensing mechanism 
        
          
            14
          
        
         is positioned in the upper left corner of the cabinet 
        
          
            12
          
        
        . A plurality of user doors 
        
          
            26
          
        
         are defined in a main dispenser door 
        
          
            25
          
        
        , which is secured by a locking latch 
        
          
            28
          
        
        . A number of receptacles or slots 
        
          
            31
          
        
         are arranged behind the user doors 
        
          
            26
          
        
         on shelves 
        
          
            30
          
        
        , forming an array of the dispensing slots 
        
          
            31
          
        
         in which garments such as surgical scrubsuits are disposed. Receptacle doors (not shown) allow access to only one column of slots, so that when one user door 
        
          
            26
          
        
         is open, only one slot is accessible.
      
    
    
      
        Referring to 
        
          FIGS. 2 and 3
        
        , receiving mechanism 
        
          
            16
          
        
         is positioned in a portion of the cabinet 
        
          
            12
          
        
         to the right of, and below the right hand portion of, the dispensing mechanism 
        
          
            14
          
        
        . An inlet chamber or chute 
        
          
            40
          
        
         is defined between an inner wall 
        
          
            42
          
        
         separating the inlet chamber 
        
          
            40
          
        
         from the dispensing mechanism 
        
          
            14
          
        
        , and an outer wall 
        
          
            13
          
        
         of the cabinet. A door 
        
          
            44
          
        
         in the front of the cabinet allows users to deposit soiled garments into the inlet chamber after entering a proper identification via the interface panel 
        
          
            20
          
        
        . Associated with the door 
        
          
            44
          
        
         are a lock solenoid 
        
          
            38
          
        
         and a limit switch 
        
          
            45
          
        
         that indicates whether the door is closed (both shown diagrammatically in FIG. 
        
          
            5
          
        
        ). When garments are deposited through the door 
        
          
            44
          
        
        , they fall past a photosensor 
        
          
            43
          
        
         which confirms that an article has in fact been deposited. As they continue to fall, the garments pass into the storage compartment 
        
          
            18
          
        
         through an inlet opening 
        
          
            46
          
        
         defined between (a) a front beam 
        
          
            47
          
        
         extending across the top of the storage compartment, (b) a rear beam 
        
          
            48
          
        
         parallel to the front beam and positioned against the back wall of the cabinet 
        
          
            12
          
        
        , (c) the end wall 
        
          
            13
          
        
         of the cabinet, and (d) an articulated paddle 
        
          
            50
          
        
        . The falling garments are deflected toward the paddle 
        
          
            50
          
        
         by an angled guide 
        
          
            49
          
        
         extending across the end wall of the cabinet, best shown in FIG. 
        
          
            3
          
        
        .
      
    
    
      
        The articulated paddle 
        
          
            50
          
        
         has an inner paddle member 
        
          
            52
          
        
         and an outer paddle member 
        
          
            54
          
        
         connected at a pivot joint 
        
          
            57
          
        
        . The inner paddle 
        
          
            52
          
        
         has a broad, flat surface and defines a pair of side flanges 
        
          
            53
          
        
         for strength extending away from the inlet chamber. Similarly, the outer paddle member 
        
          
            54
          
        
         has a broad, flat surface and defines a pair of side flanges 
        
          
            55
          
        
        . 
        
          FIG. 3
        
         shows a cross section of the paddle 
        
          
            50
          
        
        , with the paddle members biased into linear alignment by a spring 
        
          
            58
          
        
        . The outer paddle member 
        
          
            54
          
        
         extends past the joint and partly behind the inner paddle member 
        
          
            52
          
        
        , so as to provide a stop, preventing the members 
        
          
            52
          
        
         and 
        
          
            54
          
        
         from bending about the joint 
        
          
            57
          
        
         beyond linear alignment in one direction. However, pressure against the outer paddle member 
        
          
            54
          
        
         will bend it about the joint, against the force of the spring 
        
          
            58
          
        
        , in a Counterclockwise direction as viewed in FIG. 
        
          
            3
          
        
        . The one-way knee joint thus formed by the pivot joint 
        
          
            57
          
        
         may take on positions such as shown in 
        
          FIG. 4
        
        , which is described in more detail below in connection with the operation of the apparatus.
      
    
    
      
        The inner paddle member 
        
          
            52
          
        
         is fixed to a pivot axle 
        
          
            60
          
        
         that may be journaled in bearings (not shown) mounted on each of the rails 
        
          
            47
          
        
         and 
        
          
            48
          
        
        . The axle is positioned so that when the paddle 
        
          
            50
          
        
         extends vertically upward, it is adjacent to the wall 
        
          
            42
          
        
        . A sprocket 
        
          
            62
          
        
         also is fixed on the axle 
        
          
            60
          
        
        . The sprocket 
        
          
            62
          
        
         is driven via a chain 
        
          
            64
          
        
         by another sprocket 
        
          
            65
          
        
         mounted on the drive shaft of a reversible motor/gear reducer 
        
          
            67
          
        
        . The motor is mounted on a platform 
        
          
            68
          
        
         extending between the rails 
        
          
            47
          
        
         and 
        
          
            48
          
        
         in a space below the dispensing mechanism 
        
          
            14
          
        
        . If desired, the paddle can be driven clockwise by the motor and returned in the counterclockwise direction by a spring or other resilient device. An arm 
        
          
            69
          
        
         also is mounted to the drive shaft of the motor 
        
          
            67
          
        
        . The arm's path intersects a stop 
        
          
            70
          
        
         mounted below the motor platform 
        
          
            68
          
        
        .
      
    
    
      
        As shown by the dashed lines in 
        
          FIG. 3
        
        , the clockwise rotational path of the distal end of the paddle 
        
          
            50
          
        
         about the axle 
        
          
            60
          
        
         sweeps from an approximately vertical (or “home”) position, across the inlet chamber near the guide 
        
          
            49
          
        
        , between the rails 
        
          
            47
          
        
         and 
        
          
            48
          
        
         closely adjacent to the cabinet wall 
        
          
            13
          
        
        , through the storage compartment 
        
          
            18
          
        
        , past 180° of rotation within about 2-3 inches of the floor of the storage compartment 
        
          
            18
          
        
        , and to a final position about 225° from the home position, as indicated by the arrow A. When the paddle 
        
          
            50
          
        
         is in the home position, the arm 
        
          
            69
          
        
         abuts the left side of the stop 
        
          
            70
          
        
         as viewed in FIG. 
        
          
            3
          
        
        . When the paddle has rotated to its final position, the aim 
        
          
            69
          
        
         abuts the right side of the stop 
        
          
            70
          
        
        . The motor is equipped with a conventional resistance sensor 
        
          
            71
          
        
        , shown diagrammatically in 
        
          FIG. 5
        
        , connected to stop the motor when the motor must strain beyond a predetermined level attempting to rotate its drive shaft. This may occur when the arm 
        
          
            69
          
        
         contacts the right side of the stop 
        
          
            70
          
        
        , or earlier when the paddle 
        
          
            50
          
        
         encounters resistance from stored garments as described below.
      
    
    
      
        The position of the paddle 
        
          
            50
          
        
         is monitored using limit switches positioned on a plate 
        
          
            76
          
        
         mounted adjacent to the axle 
        
          
            60
          
        
        . A home position limit switch 
        
          
            73
          
        
         is located approximately vertically above the axle 
        
          
            60
          
        
        , a full position sensor 
        
          
            74
          
        
         is located at about 120° counterclockwise from the vertical, and a coast position sensor 
        
          
            75
          
        
         is located about 70° from the vertical. As the axle 
        
          
            60
          
        
         rotates, a cam 
        
          
            78
          
        
         mounted on the axle 
        
          
            60
          
        
         trips each of the three limit switches.
      
    
    
      
        The home position is designed to have a fairly wide range to allow for differences in overtravel of the paddle as it coasts. Therefore, the home position limit switch 
        
          
            73
          
        
         is positioned so that it is tripped at some point before the arm 
        
          
            69
          
        
         contacts the stop 
        
          
            70
          
        
        , and will stay tripped from that point for the entire travel distance of the arm 
        
          
            69
          
        
         to the stop.
      
    
    
      
        The storage compartment 
        
          
            18
          
        
         may be lined with an impervious storage bag 
        
          
            84
          
        
         hanging on hooks 
        
          
            85
          
        
         positioned along the rails 
        
          
            47
          
        
         and 
        
          
            48
          
        
        . The bag 
        
          
            84
          
        
         is generally the shape of the storage compartment, for example, rectangular, and defines an opening 
        
          
            86
          
        
         at the opening 
        
          
            46
          
        
         leading from the inlet chamber 
        
          
            40
          
        
        . An operator can access the bag 
        
          
            84
          
        
         for removal and replacement through doors 
        
          
            87
          
        
        , on which is a limit switch 
        
          
            88
          
        
         (shown diagrammatically in 
        
          FIG. 5
        
        ) that indicates whether the door is closed. The bag opening 
        
          
            86
          
        
         may be closed when removed from the compartment 
        
          
            18
          
        
        .
      
    
    
      
        The controller interface 
        
          
            20
          
        
         includes a bar code or magnetic card reader 
        
          
            90
          
        
         and a keypad 
        
          
            91
          
        
         for allowing a user to input identification information, as described in U.S. Pat. Nos. 5,638,985, 5,713,270, and 5,829,349, which are incorporated herein by reference in their entirety. For example, a user can be required to initiate a dispensing or return operation by swiping a card or by entering a user number and then keying in a PIN. An LCD or LED display 
        
          
            93
          
        
         shows information to the user, such as whether the user is authorized, whether the requested size is available, and whether or not the user has credits available. The display may also present instructions to the user on how to operate the apparatus 
        
          
            10
          
        
        . Optionally, a video or still camera 
        
          
            94
          
        
         may be positioned behind a horizontal window 
        
          
            95
          
        
         within the cabinet 
        
          
            12
          
        
         above the door 
        
          
            44
          
        
         to look down into the inlet chamber 
        
          
            40
          
        
        . The camera may be connected to a video tape recorder 
        
          
            96
          
        
         and/or a television monitor 
        
          
            97
          
        
         located in the electronics compartment 
        
          
            22
          
        
        . This equipment may be used to record transactions for security and verification. A printer may also be located in the compartment 
        
          
            22
          
        
         to allow easy printing of data stored in the memory of the processor 
        
          
            36
          
        
        .
      
    
    
      
        
          FIG. 5
        
         shows a block diagram of a control system 
        
          
            100
          
        
         for operating the combined dispensing and receiving apparatus 
        
          
            10
          
        
        . The microprocessors 
        
          
            35
          
        
         and 
        
          
            36
          
        
         includes memory (not shown) for storing software modules for operating the apparatus 
        
          
            10
          
        
        . This software is responsive to various inputs from sensors and input devices described above and issues signals to operate various components of the apparatus. The dispensing mechanism 
        
          
            14
          
        
         is operated in the manner described in U.S. Pat. No. 5,638,985. Input signals 
        
          
            102
          
        
         from the dispensing mechanism 
        
          
            14
          
        
         are shown diagrammatically. Software drivers 
        
          
            101
          
        
         for operating the motors, solenoids, etc., of the dispensing mechanism 
        
          
            14
          
        
         are also shown diagrammatically.
      
    
    
      
        The same microprocessors 
        
          
            35
          
        
         and 
        
          
            36
          
        
         may control both the dispensing and receiving mechanisms. The processor 
        
          
            36
          
        
         at the panel 
        
          
            20
          
        
         includes a memory that stores information about the location and contents of each receptacle, such as whether the receptacle is full and the sizes of the garments it contains. A program in the processor 
        
          
            36
          
        
         allows an operator who is loading the machine with new scrubsuits to use the keypad 
        
          
            91
          
        
         to modify the full/empty status of each slot in the memory. In the alternative, a remote computer 
        
          
            104
          
        
         may program the sizes for each slot. The memory of the processor 
        
          
            36
          
        
         also stores the “credits” allocated to each user and not previously used.
      
    
    
      
        At the interface panel 
        
          
            20
          
        
        , the card reader 
        
          
            90
          
        
        , keypad 
        
          
            91
          
        
        , and display 
        
          
            93
          
        
         are controlled by the processor 
        
          
            36
          
        
        , the memory of which holds a list of authorized card numbers. Each user can initiate a dispensing operation by entering a user number and personal identification number (PIN) at the user interface panel 
        
          
            20
          
        
         in a manner described below. The processor 
        
          
            36
          
        
         is programmed to determine whether a set of garments meeting the needs of that user is in inventory, and in which receptacle that set is located. If the correct garment is present, the processor 
        
          
            36
          
        
         instructs the processor 
        
          
            35
          
        
         to operate the mechanism to move the receptacle doors to expose the column of receptacles 
        
          
            31
          
        
         in which that slot is located, and unlocks the user door 
        
          
            26
          
        
         at that row. After the user withdraws the set of garments in the receptacle and closes the door, the processor 
        
          
            35
          
        
         locks the door and updates the memory to reflect the empty status of that receptacle, and updates the user's credit account.
      
    
    
      
        The processor 
        
          
            35
          
        
         controls the operation of all the motors and solenoids for the apparatus 
        
          
            10
          
        
        , and receives input signals from switches as needed to open the correct slot requested by the processor 
        
          
            36
          
        
        . For the retrieving mechanism 
        
          
            16
          
        
        , the processor 
        
          
            35
          
        
         also includes retriever drivers 
        
          
            103
          
        
         for operating the door solenoid 
        
          
            38
          
        
         to lock and unlock the door 
        
          
            44
          
        
        , and for operating the sweep motor 
        
          
            67
          
        
         to move the paddle 
        
          
            50
          
        
        . To determine when to operate these devices, the processor 
        
          
            35
          
        
         utilizes inputs from the load sensor 
        
          
            71
          
        
         associated with the motor 
        
          
            67
          
        
        , the paddle position limit switches 
        
          
            73
          
        
        , 
        
          
            74
          
        
        , and 
        
          
            75
          
        
        , the door limit switch 
        
          
            45
          
        
         on the door 
        
          
            44
          
        
        , and the photosensor 
        
          
            43
          
        
         in the inlet chamber. Inputs to the processor 
        
          
            36
          
        
         include data read by the card reader 
        
          
            90
          
        
         and input via the keypad 
        
          
            91
          
        
        . The processor 
        
          
            35
          
        
         sends signals to control the VCR 
        
          
            96
          
        
        . Separately, the processor 
        
          
            36
          
        
         controls the display 
        
          
            93
          
        
         and the printer 
        
          
            98
          
        
        . The apparatus 
        
          
            10
          
        
         may be linked to other systems, for example a remote central computer 
        
          
            104
          
        
        . The processor 
        
          
            36
          
        
         may obtain information on individual user accounts from the central computer 
        
          
            104
          
        
        , and return data regarding usage at the apparatus 
        
          
            10
          
        
        . The processor 
        
          
            36
          
        
         also may be networked along a data link 
        
          
            105
          
        
         to other dispensing/receiving machines with links 
        
          
            106
          
        
         to the central computer 
        
          
            104
          
        
        . This data communication facilitates operation of a multi-station system within a large hospital or covering more than one small hospital or clinic. Further details of network operation are found in U.S. Pat. No. 5,638,985 and 5,713,270, and 5,829,349.
      
    
    
      
        Operation of the combined dispensing and receiving apparatus 
        
          
            10
          
        
         will be described with the aid of the flow diagram of 
        
          FIG. 6. A
        
         user approaches the apparatus 
        
          
            10
          
        
         and at step 
        
          
            601
          
        
        , swipes a bar code or a magnetic card through the card reader 
        
          
            90
          
        
        , or at step 
        
          
            602
          
        
        , enters a card number and PIN number at the keypad 
        
          
            91
          
        
        . The user selects the desired mode of operation (withdraw or return garments) at the keypad 
        
          
            91
          
        
        . These entries may be prompted by the display 
        
          
            93
          
        
        . At step 
        
          
            603
          
        
         the processor determines whether the bar code or the magnetically entered user number or keypad entered user number and PIN number are valid. If not, the program returns to the ready mode. If so, the processor at step 
        
          
            604
          
        
         allows the user to select whether or not to withdraw or return garments on his or her account.
      
    
    
      
        If the choice is to withdraw garments from the dispensing mechanism 
        
          
            14
          
        
        , the program proceeds to step 
        
          
            605
          
        
         where the processor determines whether the user has credit available to make a withdrawal. If so, the dispensing process continues as described in U.S. Pat. No. 5,638,985. The steps there described will not be repeated in detail, such as receiving a requested size and determining and reporting whether the requested size is available and proper for the user. The dispensing process may proceed at step 
        
          
            607
          
        
         to dispense a garment from one of the slots 
        
          
            31
          
        
        , and the inventory and user credit history may be updated at step 
        
          
            608
          
        
        .
      
    
    
      
        If the user has chosen to return garments at step 
        
          
            604
          
        
        , the The processor activates the video camera 
        
          
            94
          
        
         at step 
        
          
            610
          
        
         to record what is actually deposited into the inlet chamber 
        
          
            40
          
        
        , and unlocks the return door solenoid 
        
          
            38
          
        
         at step 
        
          
            611
          
        
        . At step 
        
          
            612
          
        
        , the user opens the return door 
        
          
            44
          
        
         and deposits the garments into the door and closes it. The door limit switch 
        
          
            45
          
        
         detects the closing of the door 
        
          
            44
          
        
        , and the processor locks it by releasing the solenoid 
        
          
            38
          
        
         which allows a spring latch (not shown) to lock the door at step 
        
          
            613
          
        
        . As the garments fall through the inlet chamber 
        
          
            40
          
        
        , they trigger the photocell sensor 
        
          
            43
          
        
         at step 
        
          
            614
          
        
        , which sends a signal to the processor 
        
          
            35
          
        
         which sends data to the processor 
        
          
            36
          
        
         confirming that a deposit did accompany the door opening and closing. If the sensor 
        
          
            43
          
        
         does not detect a passing article, the processor 
        
          
            36
          
        
         determines at step 
        
          
            615
          
        
         that no credit will be given to the user's account.
      
    
    
      
        When garment confirmation is made at step 
        
          
            616
          
        
        , the processor 
        
          
            36
          
        
         adds one set of garments to the user's credit account. Also, after a garment has triggered the sensor 
        
          
            43
          
        
        , the processor 
        
          
            35
          
        
         causes the motor 
        
          
            67
          
        
         to begin rotating the axle 
        
          
            60
          
        
        , and with it, the paddle 
        
          
            50
          
        
         and the cam 
        
          
            78
          
        
        .
      
    
    
      
        Referring to 
        
          FIG. 4
        
        , as the paddle rotates from the home position, it pushes garments G within the inlet chamber 
        
          
            40
          
        
         into the storage compartment 
        
          
            18
          
        
        , preferably into the bag 
        
          
            84
          
        
        . Continued rotation of the paddle sweeps the garments toward the inner portion of the storage compartment 
        
          
            18
          
        
         under the dispensing mechanism 
        
          
            14
          
        
        . The paddle 
        
          
            50
          
        
         may or may not pass the full limit switch 
        
          
            74
          
        
        , depending on the contents of the storage chamber. If so, a signal is received by the processor 
        
          
            35
          
        
        . During this clockwise rotation, the paddle 
        
          
            50
          
        
         remains straight, and rotates until it encounters resistance from compacted garments if sufficient garments are present. The movement of the paddle on encountering resistance will compact the garments first in the inner, upper corner of the compartment 
        
          
            18
          
        
         with an upward movement of the paddle, as shown in 
        
          FIG. 4
        
         with the paddle in dashed outline. Then, sufficient resistance triggers the resistance sensor associated with the motor 
        
          
            67
          
        
        , which signals the processor to reverse rotation of the paddle at step 
        
          
            619
          
        
        . If only a few garments are in the storage compartment, the paddle will reach its maximum travel at the angle A (225°) and the arm 
        
          
            69
          
        
         will engage the stop 
        
          
            70
          
        
        , causing the motor to reverse in the same way.
      
    
    
      
        As the paddle 
        
          
            50
          
        
         moves counterclockwise, some garments it has compressed may fall back from the corner. Such garments will be packed into the corner again on the next cycle of the paddle. Also during return motion, the paddle may engage garments G within the storage compartment. The full line position of the paddle 
        
          
            50
          
        
         in 
        
          FIG. 4
        
         shows the paddle members 
        
          
            52
          
        
         and 
        
          
            54
          
        
         articulated about the joint 
        
          
            57
          
        
         to pass by garments G. Sufficient force has been placed on the paddle member 
        
          
            54
          
        
         to bend it about the joint 
        
          
            57
          
        
        . As soon as the paddle clears the garments G, the spring 
        
          
            58
          
        
         will straighten the paddle members, so that in the home position the paddle will be approximately vertical, and will not be in the path of garments deposited into the inlet chamber 
        
          
            40
          
        
        .
      
    
    
      
        During return movement of the paddle 
        
          
            50
          
        
         counterclockwise toward the home position, the paddle triggers the coast limit switch 
        
          
            75
          
        
        . At step 
        
          
            620
          
        
        , the processor 
        
          
            35
          
        
         monitors the coast limit switch. Until it is triggered, the motor 
        
          
            67
          
        
         continues to drive in reverse. When the limit switch 
        
          
            75
          
        
         is triggered by the cam 
        
          
            78
          
        
        , power to the motor is disconnected at step 
        
          
            621
          
        
        , allowing the paddle to coast into the home position. If there is enough coast, the arm 
        
          
            69
          
        
         on the motor meets the stop 
        
          
            70
          
        
        . When the home limit switch 
        
          
            73
          
        
         is triggered, the processor checks at step 
        
          
            622
          
        
         to determine whether the full limit switch 
        
          
            74
          
        
         was passed during the preceding paddle cycle. If not, this indicates the storage compartment 
        
          
            18
          
        
         is full, and further operation of the receiving mechanism 
        
          
            16
          
        
         is disabled at step 
        
          
            623
          
        
         until the compartment 
        
          
            18
          
        
         is cleared (for example, by removing and replacing the bag 
        
          
            84
          
        
        ). A signal indicating the apparatus 
        
          
            10
          
        
         is full is sent to the processor 
        
          
            36
          
        
         and may be sent to the central computer 
        
          
            104
          
        
        , and a “FULL” message may be shown on the display 
        
          
            93
          
        
        . If the full limit switch was passed during the previous cycle, then the compartment 
        
          
            18
          
        
         has more capacity and the program returns to the ready state until another user logs in.
      
    
    
      
        An operator may check on the apparatus 
        
          
            10
          
        
         periodically, or when the inventory data maintained on the central computer 
        
          
            104
          
        
         indicates the storage compartment 
        
          
            18
          
        
         is full, or the dispensing mechanism 
        
          
            14
          
        
         is empty or needs restocking in certain sizes. The operator has key access to the storage doors 
        
          
            87
          
        
         and to the latch 
        
          
            28
          
        
         of the dispenser main door 
        
          
            25
          
        
        . The operator may restock the empty slots. The programming of which size should be loaded into which slot is performed at the computer 
        
          
            104
          
        
         and displayed on the display 
        
          
            93
          
        
         to the operator. However, if the apparatus 
        
          
            10
          
        
         is not connected to a computer 
        
          
            104
          
        
        , the operator logs in the slots that are loaded using the keypad 
        
          
            91
          
        
        .
      
    
    
      
        The operator may also remove and close the bag 
        
          
            84
          
        
        , and install another bag 
        
          
            84
          
        
         in the storage compartment 
        
          
            18
          
        
        . The receiving mechanism 
        
          
            16
          
        
         is automatically reset when the limit switch 
        
          
            88
          
        
         indicates that the door 
        
          
            87
          
        
         has been opened. In this case a door open signal is sent to the processor 
        
          
            35
          
        
        , which informs the processor 
        
          
            36
          
        
         that the storage compartment 
        
          
            18
          
        
         has been emptied. Safety switches (not shown) on the doors 
        
          
            87
          
        
         prevent operation of the motor 
        
          
            67
          
        
         while the doors 
        
          
            87
          
        
         are open. When the operator finishes servicing the apparatus 
        
          
            10
          
        
        , he or she resets the control circuit 
        
          
            100
          
        
         to allow further access by users as described above.
      
    
    
      
        In one embodiment of the invention, the processor 
        
          
            36
          
        
         is programmed to operate the paddle mechanism only periodically when the storage chamber 
        
          
            18
          
        
         is relatively empty. There is no need under these conditions to pack the garments after every deposit, and the packing steps can be skipped for all but one of every five to ten cycles of accepting returned garments. This procedure eliminates the time of operation of the paddle from the majority of deposit cycles, and therefore beneficially reduces the average cycle time that users must wait for the apparatus to become ready for another deposit. After a predetermined number of deposit cycles, for example between 
        
          
            50
          
        
         and 
        
          
            60
          
        
         deposit cycles, the receiving mechanism may pack the garments after every deposit to insure that the scrubsuits do not back up into the inlet chamber 
        
          
            40
          
        
         and are properly packed.
      
    
    
      
        It is possible to use a stock confirmation terminal of the type shown in U.S. Pat. No. 5,638,985 in connection with the apparatus 
        
          
            10
          
        
        , but this may not be desired with the smaller dispensing mechanism 
        
          
            14
          
        
        .
      
    
    
      
        The present invention may be practiced using variations in the embodiment described above. As will be clear from the foregoing, an apparatus can be constructed that can receive and pack goods, such as garments or the like, laterally with respect to the location of the intake and compacting mechanisms. Also, a compact apparatus can be constructed that will that both dispense and receive cloth items.
      
    
  
             
            
                        Claims
        
                - 1. An apparatus for dispensing and receiving goods, said apparatus comprising:a cabinet; a dispensing device for cloth items positioned in an upper portion of said cabinet; a receiving chamber positioned adjacent to said dispensing device in said upper portion of said cabinet and including an opening through which cloth items may be inserted into said receiving chamber; a storage chamber positioned in a lower portion of said cabinet and extending beneath both said receiving chamber and said dispensing device, said storage chamber defining an opening communicating with said receiving chamber; and an arm movable in a first direction from an initial position to an extended position and movable back toward said initial position in a second direction opposite to said first direction, to move cloth items to a portion of said storage chamber beneath said dispensing device.
 
                - 2. An apparatus for dispensing and receiving goods, comprising:a cabinet; a dispensing device for cloth items positioned in an upper portion of said cabinet; a receiving chamber positioned adjacent to said dispensing device in said upper portion of said cabinet and including an opening through which cloth items may be inserted into said receiving chamber; a storage chamber positioned in a lower portion of said cabinet and extending beneath both said receiving chamber and said dispensing device, said storage chamber defining an opening communicating with said receiving chamber; and an arm movable to sweep cloth items to a portion of said storage chamber beneath said dispensing device; wherein said arm moves between a position within said receiving chamber to a position within said storage chamber.
 
                - 3. An apparatus for dispensing and receiving goods, comprising:a cabinet; a dispensing device for cloth items positioned in an upper portion of said cabinet; a receiving chamber positioned adjacent to said dispensing device in said upper portion of said cabinet and including an opening through which cloth items may be inserted into said receiving chamber; a storage chamber positioned in a lower portion of said cabinet and extending beneath both said receiving chamber and said dispensing device, said storage chamber defining an opening communicating with said receiving chamber; and an arm movable to sweep cloth items to a portion of said storage chamber beneath said dispensing device, said arm comprising: a) an articulated paddle mounted for rotation about a pivot axis and defining a one-way joint at a location between said pivot axis and an outer end of said paddle; b) a drive mechanism connected to rotate said paddle about said pivot axis from an initial position toward said storage chamber and back toward said initial position; and c) said joint holding said paddle in an extended configuration against resistance when said paddle is rotating toward said storage chamber; and allowing said paddle to fold when said paddle is rotating back toward said initial position.
 
                - 4. The apparatus of claim 3, wherein said drive mechanism is capable of rotating said paddle into said storage chamber.
 
                - 5. The apparatus of claim 4, wherein in said initial position of said paddle assembly said paddle lies in a plane adjacent to a wall of said receiving chamber, and wherein said chive mechanism is capable of rotating said paddle into said storage chamber and through an angle greater than 180 degrees from said initial position.
 
                - 6. The apparatus of claim 5, wherein said angle is greater than 210° from said initial position.
 
                - 7. The apparatus of claim 6, wherein said angle is about 225° or more from said initial position.
 
                - 8. The apparatus of claim 4, further comprising a resistance sensor operative to reverse rotation of said paddle toward said storage chamber responsive to said paddle encountering a preset level of resistance from goods in said storage chamber.
 
                - 9. The apparatus of claim 8, further comprising a controller connected to said drive mechanism and to said resistance sensor.
 
                - 10. The apparatus of claim 9, further comprising a first position sensor located along the rotation of said paddle at an angle indicating said storage chamber is full; said controller being connected to said first position sensor and generating a full signal in response to said paddle being reversed by said resistance sensor prior to reaching said first position sensor.
 
                - 11. The apparatus of claim 10, wherein said drive mechanism includes a motor coupled to rotate said paddle, and further comprising a second position sensor located along the rotation of said paddle at a predetermined angle from said initial position of said paddle; said controller being connected to said second position sensor and disconnecting energy to said motor in response to said second position sensor indicating passing of said paddle during return motion of said paddle toward said initial position, whereby said paddle coasts into said initial position.
 
                - 12. The apparatus of claim 3, wherein said storage chamber comprises a bag and said receiving chamber comprises a chute positioned above an inlet opening of said bag.
 
                - 13. The apparatus of claim wherein said bag extends horizontally and said chute extends vertically upward from said inlet opening.
 
                - 14. The apparatus of claim 3, further comprising:a lockable receiving door in said receiving chamber; an input device for acquiring user identification information; and a controller operatively connected to unlock said door and to operate said drive mechanism in response to information received from said input device.
 
                - 15. The apparatus of claim 14, further comprising a sensor positioned to provide a confirmation signal to said controller indicating presence of goods in said receiving chamber, said controller updating an inventory of goods and an account of a particular user associated with said information received from said input device in response to said confirmation signal.
 
                - 16. The apparatus of claim 3, wherein said drive mechanism comprises a reversible motor.
 
        
                
                
                
                
                
                            US Referenced Citations (26)