Patent Application
20100331161
The present invention relates generally to a system and a method for crumpling paper substrates. Specifically, the system and method provide for the crumpling of paper substrates to form fill or cushioning material to be utilized in product packaging to fill void space and/or to wrap around products thereby allowing for safe transport of the products.
It is generally known to transport and/or store products. Products to be transported and/or stored typically are packed within a box or other container. However, in most instances, the shape of the product does not match the shape of the container. Most containers utilized for transporting products have the general shape of a square or rectangular box and, of course, products can be any shape or size. To fit a product within a container and to safely transport and/or store the product without damage to the product, the void space within the container is typically filled with a packing or cushioning material.
The packing material utilized to fill void space within a container is typically a lightweight, air-filled material that may act as a pillow or cushion to protect the product within the container. In many circumstances, a plastic bubble material is utilized to protect and cushion the product contained within a container. However, plastic bubble material, and the process for making the plastic bubble material, can be expensive and time-consuming to produce. In addition, plastic bubble material is not adequate form-filling material in many instances, requiring specially made shapes and/or bubble patterns to effectively protect and cushion a product within a container during transport and/or storage. Plastic bubble material is also not “environmentally friendly” in that these materials are not readily biodegradable when exposed to the environment.
Small Styrofoam nuggets or “peanuts” may also be utilized to fill void space within containers for protecting and cushioning a product within a container during transport and/or storage. These nuggets or “peanuts” are also expensive to produce, and may not adequately protect a product unless a great number are used within the container to entirely fill the void space within the container. In addition, it is also difficult to contain the Styrofoam nuggets or “peanuts” within the container, especially after the container has been opened. These materials are typically extremely lightweight, and can easily blow away if caught within a wind or draft. These materials may also cause environmental degradation, as they are not readily biodegradable.
Another typical material utilized for filling void space within containers, and for protecting and cushioning a product contained within the container, is paper and/or paper substrates. Typically, sheets of paper material may be crumpled so as to form long shapes having many folds or pleats. Lengths of crumpled paper may be created to easily and effectively fill void space within a container holding a product. Because the paper has fold spaces and/or pleats, the crumpled paper may be very effective at protecting and cushioning a product contained within the container, and may effectively prevent damage to the product during transport and/or storage.
Sheets of paper may be crumpled by hand, in that a person may take a length of a sheet of paper, and crumple the paper to form various shapes to fill void space within a container to protect and cushion a product contained therein. However, hand crumpling paper takes much time, and is not effective and/or efficient to provide a large amount of crumpled paper as may be needed in a production line. Machines, therefore, are necessary to crumple paper.
Typical machines utilized to crumple paper generally take a length of a sheet of paper, and feed the paper into a crumpling zone of the machine to provide a crumpled paper product. However, typical machines suffer from a host of problems. For example, long sheets of paper substrate material are typically provided on rolls and are fed into machines at a high rate of speed. It is difficult to control the rate of speed for the paper substrate to be removed from the roll. Without a braking mechanism, the roll unwinds at a higher rate of speed than the paper is being fed into the machine causing paper to spill off the roll. Typically, this occurs when the rate of paper being fed into the crumpling machine slows, and momentum causes the roll, which is heavy with paper, to continue rolling. A need exists, therefore, for a crumpling machine having an adequate braking mechanism to solve this problem.
In addition, typical braking mechanisms utilized for rolls of paper sheeting involve a system utilizing an axis bar that is disposed entirely through the core of a paper roll. A tensioned washer or disk is typically provided on either or both sides of the paper roll that may apply pressure to one or both of the side surfaces of the paper rolls to prevent the roll from spinning when the machine is not ready to receive paper, thereby preventing spillage of the paper off the roll. This braking mechanism, however, is typically extremely heavy and bulky, in that it requires a heavy metal axis bar that must then be dropped within arms to hold the paper roll in place. It is difficult to quickly and efficiently remove and add paper rolls to paper crumpling machines utilizing a braking mechanism as described above. A need exists, therefore, for a braking mechanism and paper roll-holding mechanism allowing for easy and efficient removal and replacement of paper rolls.
Moreover, typical machines utilized for crumpling paper do not adequately distribute load laterally across the paper from end to end. Frequently, long sheets of paper substrate may tear when being fed within the paper crumpling machine. Typically, this occurs due to tension applied to the edges of the paper sheet, which is typically the weakest part of the paper sheet. Small fissures or tears in the edges of the paper sheeting can become large tears, or tears that completely traverse the paper sheeting, when tension is applied to the edges of the paper sheeting. A need exists, therefore, for a paper sheeting guide that allows paper sheeting to be fed into a paper crumpling machine without causing unnecessary tears or rips in the paper sheeting.
In addition, tension may be unevenly distributed longitudinally causing problems during the crumpling process of the paper sheeting, especially through the feed mechanism. Uneven shapes or thicknesses of the crumpled paper, in addition to differences in paper feed rates, may cause slippage of the paper sheeting through the crumpling machines. A need exists, therefore, for a crumpling process and/or feed mechanism that automatically adjusts tension based on the shape, thickness and/or speed of the crumpled paper fed therethrough.
Typical crumpling machines utilize, generally, hard materials for feeding and/or crumpling paper fed therethrough. Specifically, metal cylinders, with or without teeth, may be utilized for feeding paper through the machine. The hardness of the feeding and/or crumpling mechanism may be directly responsible for lateral tears or rips of the paper sheeting, and may typically produce an abundance of noise during the paper crumpling process. In addition, metal, or other hard feeding and/or crumpling mechanisms, may not provide adequate traction for the paper sheeting fed therethrough. A need, therefore, exists for a feeding and/or crumpling mechanism made from relatively soft materials that may solve the problems associated with utilizing metal in the feeding and/or crumpling mechanisms.
Moreover, a paper crumpling machine should allow for the tearing of the crumpled paper when desired. Typically, a knife may be utilized to cut the crumpled paper such that individual lengths of crumpled paper may be produced. Typical knives utilized for cutting lengths of crumpled paper can be dangerous, especially since the blade can be exposed in an area of the crumpling machine that typically requires an individual to place his or her hands therein to pull paper therethrough for setting up or clearing a jam from the machine. A need exists, therefore, for a cutting mechanism that is safe and does not injure an individual that must place his or her hands in the machine to feed the paper therethrough.
In addition, a paper crumpling machine should also allow for efficient loading of the successfully crumpled paper into a container for storage or transport. The crumpled and cut paper should exit the crumpling machine with minimal or no buildup that could jam the machine. Typical paper crumpling machines that steer or manipulate the paper into a container as the paper is moving can cause the paper to backup and jam the apparatus, for example, by causing buildup of material near the drive rollers. A need exists, therefore, for a machine comprising an exit zone that efficiently moves crumpled and cut material away from the crumpling zone and cutting mechanism, and into a suitable container.
The present subject matter relates generally to a system and a method for crumpling paper substrates. Specifically, the system and method provide for the crumpling of paper substrates to form dunnage or fill material to be utilized in product packaging to fill void space and/or to wrap around products thereby allowing for safe transport of the products.
To this end, in an embodiment of the present invention, a paper crumpling apparatus is provided. The paper crumpling apparatus comprises a paper feeder for feeding paper sheeting, wherein said paper feeder comprises a guide having a plurality of tines for guiding the paper sheeting; and a paper crumpling zone wherein said paper crumpling zone crumples the paper sheeting fed thereinto by the paper feeder.
In an alternate embodiment of the present invention, a paper crumpling apparatus is provided comprising a paper feeder for feeding paper sheeting; and a crumpling zone wherein said crumpling zone crumples the paper sheeting fed thereinto by the paper feeder, wherein said paper feeder comprises a brake arm having a tapered cap for disposing in an opening of a paper roll such that the cap brakes the spin of the paper roll.
In a further alternate embodiment of the present invention, a paper crumpling apparatus is provided comprising a paper feeder for feeding paper sheeting; a crumpling zone wherein the crumpling zone crumples the paper sheeting fed thereinto by the paper feeder; and a tensioner for supplying tension to the paper sheeting, wherein said tensioner increases tension on the paper sheeting when a rate of feeding the paper sheeting into the crumpling zone increases.
In addition, in a further alternate embodiment, a paper crumpling apparatus is provided comprising a paper feeder for feeding paper sheeting; a crumpling zone wherein the crumpling zone crumples the paper sheeting fed thereinto by the paper feeder; a paper cutter; and a drive for alternately feeding the paper sheeting into the crumpling zone and cutting the paper with the paper cutter.
Moreover, in a still further alternate embodiment of the present invention, a paper crumpling apparatus is provided comprising a paper feeder for feeding paper sheeting; a crumpling zone wherein the crumpling zone crumples the paper sheeting fed thereinto by the paper feeder; a paper cutter for cutting the paper sheeting after being crumpled in the crumpling zone, wherein said paper cutter comprises a blade, wherein said paper cutter comprises a protective bottom plate section and further wherein said blade extends from said protective bottom plate section when said paper cutter cuts the paper sheeting.
In a further alternate embodiment of the present invention, a paper crumpling apparatus cutting mechanism is provided comprising a pusher, wherein said pusher comprises at least one arm attached to at least one rod driven by a motor, a blade, and a protective bottom plate section, wherein said bottom plate section prevents the blade from being exposed unless the rods are engaged by a motor causing the pusher to compress the bottom plate section thereby exposing the blade and cutting the paper.
In a still further alternate embodiment of the present invention, a paper crumpling apparatus tearing mechanism is provided comprising a pusher, wherein said pusher comprises at least one arm attached to at least one rod driven by a motor, a bottom plate section, and perforated paper, wherein said rod, when engaged by the motor, pulls the pusher down onto the bottom plate section thereby clamping the perforated paper between the pusher and the bottom plate section.
Moreover, in a still further alternate embodiment of the present invention, a paper crumpling apparatus is provided comprising a brake arm having a tapered cap for disposing in an opening of a paper roll such that the cap brakes the spin of the paper roll as paper sheeting is removed from said paper roll; a paper feeder for feeding paper sheeting, wherein said paper feeder comprises a guide having a plurality of tines for guiding the paper sheeting; a crumpling zone wherein the crumpling zone crumples the paper sheeting fed thereinto by the paper feeder; a tensioner for supplying tension to the paper sheeting, wherein said tensioner increases tension on the paper sheeting when a rate of feeding the paper sheeting into the crumpling zone increases; a paper cutter; and a drive for alternately feeding the paper sheeting into the crumpling zone and cutting the paper sheeting with the paper cutter.
In a further alternate embodiment of the present invention, a paper crumbling apparatus is provided comprising a paper feeder for feeding paper sheeting; and a crumpling zone wherein said crumpling zone comprises a door that is removably attached to one or more guide rollers, wherein one or more guide rollers may disengage from the paper sheeting upon overload of paper sheeting in the crumpling zone and/or upon opening of a machine door by an operator.
In a further alternate embodiment, a paper crumbling apparatus is provided comprising a cutting mechanism wherein said cutting mechanism comprises a blade that is semi-rigidly attached to one or more mounting blocks, wherein the angle of contact of said blade to said paper may be change within the range of motion permitted to the blade within a mounting slot.
The drawing figures depict one or more implementations in accord with the present concepts, by way of example only, not by way of limitations. In the figures, like reference numerals refer to the same or similar elements.
The invention and embodiments described herein relates generally to a system and a method for crumpling paper substrates. Specifically, the system and method provide for the crumpling of paper substrates to form fill material to be utilized in product packaging to fill void space and/or to wrap around products thereby allowing for safe transport of the products.
Illustrative embodiments will now be described to provide an overall understanding of a paper crumpling system and a method for crumpling paper. One or more examples of the illustrative embodiments are shown in the drawings. Those of ordinary skill in the art will understand that each disclosed embodiment or portion of the paper crumpling system and method of crumpling paper can be adapted and modified to provide alternative embodiments, and that other additions and modifications can be made to the disclosed paper crumpling system and method of crumpling paper without departing from the scope of the present disclosure. For example, features of the illustrative embodiments can be combined, separated, interchanged, and/or rearranged to generate other embodiments. Such modifications and variations are intended to be included within the scope of the present disclosure.
Unless otherwise provided, when the articles “a” or “an” are used herein to modify a noun, such articles can be understood to include one or more than one of the modified noun.
Referring now to the figures, wherein like numerals refer to like parts,
The paper sheeting 12 may be any size or kind apparent to one having ordinary skill in the art that is sufficiently wide to enter the paper crumpling apparatus 10 and have folds and/or pleats applied thereto. Typically, the paper sheeting 12 is anywhere between about 15 inches and about 36 inches, although any other width may be utilized. Moreover, the paper sheeting may be made from virgin paper fibers and/or recycled paper fibers, such that the paper sheeting has sufficient strength to be taken from the roll 14 and fed through the paper crumpling machine without unreasonable tearing or ripping thereof. The paper sheeting 12 may further have perforations pre-pressed into the paper at set intervals to allow for intentional tearing of the paper.
In a preferred embodiment of the present invention, illustrated in
The upper surface 26 provides a first portion of a brake mechanism that prevents the paper sheeting 12 on the roll 14 from uncontrolled unrolling or unraveling, such as would happen when the roll 14 rolls at a faster rate than the paper crumpling apparatus 10 feeds the paper sheeting 12 therethrough. For example, if the paper crumpling apparatus 10 takes up paper sheeting 12 at a first rate, then slows down suddenly to a second rate, the momentum of the roll 14 may cause the rate of the spin of the roll 14 to remain fast, if there is no braking mechanism to keep the roll 14 from rolling at the faster rate. The friction of the roll 14 on the upper surface 26 of the arm 22 provides the braking mechanism, in that the weight of the roil 14 on the upper surface 26 provides sufficient friction to prevent the paper sheeting 12 from uncontrolled unrolling. The friction of the upper surface 26 and the roll 14 may be influenced by a host of factors, including the material utilized for the upper surface 26, the shape of the upper surface 26, and/or the type of paper being fed.
The roll 14 may further be removably engaged or otherwise connected to an brake arm 30 that is engaged to an open end of the core of the roll 14 of the paper sheeting 12 via a cap 32. The cap 32 fits within the open end of the core of the roll 14 and contacts the inside surface of the core of the roll 14. The core of the roll 14 is typically a tube of rigid material, such as cardboard, that holds the paper sheeting wrapped therearound.
To provide braking capabilities for the roll 14, the cap 32 does not spin with the roll 14, but provides friction to the inside surface of the core of the roll 14 to keep the roll 14 from uncontrolled unraveling. The cap 32 is tapered so as to engage the inside surface of the core of the roll 14, and may continue to provide a friction surface if the inside surface of the open end of the roll wears down through use. A spring 34 engages the cap and allows a plunger 36 to push the cap against the opening of the roll 14 to provide the requisite friction to prevent uncontrolled unrolling or unraveling of the roll 14. The spring further helps the cap 32 maintain engaged contact with the inside surface of the core of the roll 14 when the inside surface of the core of the roll 14 wears due to use.
To disengage the roll 14 from the paper crumpling apparatus 10, the plunger 36 may be pulled, thereby disengaging the cap 32 from the opening in the roll 14, and the roll 14 may be removed. Alternatively, to engage the roll 14 of the paper sheeting 12, the plunger 36 may be pulled, thereby allowing an individual to place the roll on the upper surface 26 of the arm 22, and the cap 32 may be fit within the opening on the side of the roll 14 formed by the core of the roll 14.
The brake arm 30 has a pivot point 38 allowing the arm to pivot. When the cap 32 is engaged to the opening of the roll 14 of the paper sheeting 12, the brake arm 30 has the dual function of maintaining the roll 14 in position on the upper surface 26 of the arm 22, but to also allow the weight of the roll 14 of the paper sheeting 12 to allow the roll 14 to maintain contact with the upper surfaces 26 of the arm 22. As the roll 14 of the paper sheeting 12 unwinds, the radius of the roll 14 decreases, and the roll 14 must fall to maintain contact with the upper surface 26 of the arm 22. The pivot point 38 allows the brake arm 30 and, consequently, the roll 14 to fall and maintain contact with the upper surface 26 of the arm 26.
The braking mechanism utilized to prevent the roll 14 of the paper sheeting 12 from unrolling or unraveling uncontrollably is provided by both the contact of the roll 14 with the upper surfaces 26 of the arms 22, and the contact of the opening of the roll 14 of the paper sheeting 12 with the cap 32. The brake arm 30 also maintains the roll 14 in position on the arm 22. In addition, a second brake arm (not shown) may be provided on the opposite side of the roll 14 to provide the same function as the brake arm 30, including a cap (not shown) engaged with an opening of the roll 14 of the opposite side of the roll 14. The second brake arm may, generally, be identical to the brake arm 30, thereby allowing engagement of the cap (not shown) with the second opening (not shown) of the roll 14. The second brake arm on the opposite side may further have a pivot point (not shown) for allowing the second brake arm to pivot when the roll 14 unrolls during use of the paper crumpling apparatus 10.
A storage space 40 may be provided on the arm 22 for storing a second roll 42 (not shown). When the roll 14 must be replaced, such as when all or most of the paper sheeting 12 is removed from the roll 14 and fed into the paper crumpling machine 10, the roll 42 may be moved into position on the upper surface 26 of the arm 22 and the openings in the core of the roll 42 may engage the cap 32 and the cap on the opposite side (not shown). A third roll of paper sheeting may then be placed on the storage space 40 until the roll 42 is depleted.
The rake 50 may have a plurality of tines 58a, 58b, 58c, 58d and 58e for guiding the paper sheeting 12 toward the rollers 52, 54. Between the plurality of tines 58a-58e may be a plurality of spaces 60a, 60b, 60c and 60d. The plurality of space 60a-60d provide space for the paper sheeting 12 to be pushed or fall into, thereby creating troughs in the paper sheeting 12 as the paper sheeting 12 is fed toward the rollers 52, 54.
The tines 58a-58e are shaped in such as way as to efficiently guide the paper sheeting 12 through the rollers 52, 54. Moreover, the tines 58a-58e are further shaped to allow the paper sheeting 12 to form the troughs therein. A preferred embodiment of the present invention is illustrated in
A horn 64 may also help guide the paper sheeting 12 through the rollers 52, 54. Horn arms 66, 68 help prevent the paper sheeting from moving laterally with respect to the direction of feeding the paper sheeting through the rollers 52, 54. In addition, the horn arms 66, 68 help the edges of the paper sheeting 12 to fold under the paper sheeting, thereby removing tension or load from the edges of the paper sheeting 12. Tears or rips in the paper sheeting 12 frequently are due to tension placed on the edges of the paper sheeting, where small fissures in the paper sheeting 12 may develop into larger and more destructive tears or rips in the paper sheeting 12. By folding the edges of the paper sheeting 12 thereunder, the outer edge of the paper sheeting 12 becomes the first fold line disposed on opposite sides of the paper sheeting.
The rollers 52, 54 may allow the paper sheeting 12 to traverse therethrough, and provide guidance for the paper sheeting as it moves to the next stage of the paper crumpling process. Moreover, the rollers 52, 54 may cause a further reduction in the width of the paper sheeting 12 after passing over the rake 50. The rollers may be made from any material, such as thermoplastic polymeric material, metal, or any other material apparent to one having ordinary skill in the art. In a preferred embodiment, the rollers 52, 54 may be made from soft thermoplastic material, such as polyurethane, for example. The soft thermoplastic material provides increased friction when the rollers 52, 54 contact the paper sheeting 12, thereby reducing slippage of the paper sheeting 12 as it passes therethrough. Softer thermoplastic materials also tend to decrease the potential for damaging the paper sheeting 12 as it passes therethrough.
In this embodiment, rollers 52 and 54 together form a neck at about the end of rake 50. The width of the paper sheeting material may be reduced as it travels through the neck area. As noted above, the neck is preferably but not necessarily formed from one or more rollers. Although
The next stage of the paper crumpling process involves feeding the paper substrate into a paper crumpling zone 100, as shown in the cut-away perspective view of the paper crumpling zone 100 in
The paper sheeting 12, after traveling over the rake 50, is guided under first guide roller 102 and disposed adjacent to drum 104. The paper sheeting 12 traverses over the surface of the drum 104 and between the drum 104 and a second guide roller 106. After passing through a space between the second guide roller 106 and the drum 104, the crumpled paper product traverses through opening 108. The folds and/or pleats formed within the paper sheeting 12 are formed primarily when the paper sheeting passes between the drum 104 and the second guide roller 106.
The drum is interconnected with a drive mechanism that allows the drum to rotate in a direction so as to feed the paper sheeting 12 through the paper crumpling zone 100. In
Near the opening 108 is a pusher 110 and a bottom plate section 136 having a first portion 138 and a second portion 140 with a blade 112 disposed therein, as shown in
Still referring to
The first and second guide rollers 102, 106 are self-tensioning, and respond when the paper sheeting is fed therethrough at increased or decreased speeds. For example, if the drum 104 turns faster, the interaction of the drum 104 and the second guide roller 106 pulls the paper sheeting 12 therethrough at a faster rate. When tension is increased on the paper sheeting 12, it causes the first guide roller to get pushed upwards by the paper sheeting material 12. In response, a first tensioning arm 114, interconnected with a second tensioning arm 116 through a pivot point 118, causes the second tensioning arm 116 to push downwardly, thereby pushing the second guide roller 106 closer to the drum 104. This has the effect of increasing the pressure applied to the paper sheeting 12 at the convergence point of the second guide roller 106 and the drum 104, increasing quality of the folds and/or pleats disposed therein, and providing increased traction of the second guide roller 106 on the paper sheeting 12. When speed decreases, the first guide roller 102 is allowed to fall downwardly thereby reducing tension on the second guide roller 106 and allowing the second guide roller to lift away from the drum 104 via the pivot point 118.
A crank 126 may be attached to the first cylinder 120, and may further be attached thereto with a second clutch bearing (not shown), such that the crank 126 may only spin when the first cylinder turns in one of the two directions. In the present embodiment, the crank 126 only spins when the first cylinder 120 spins in a clockwise direction, in the view shown in
The first cylinder 120, the second cylinder 124, the crank 126, the arm 128 and the clutch bearings (not shown) allow either a single motor or two separate motors to drive both the paper feed mechanism and the cutting mechanism of the paper crumpling apparatus 10 of the present invention. If a single motor is utilize, the paper feed mechanism and cutter mechanism may operate by merely reversing the rotation of the drive.
Attached to the head 110 is a first pusher 142 and a second pusher 144 which may further traverse in the downward direction when the head 110 moves in the downward direction, caused by the pulling of the arm 128 via the crank 126, as shown in
In another embodiment, illustrated in
In a further embodiment, illustrated in
The head 210 may further have a safety sleeve 230 that is blocked from moving when the head 210 and the blade 212 move downwardly. The safety sleeve 230 generally covers the blade 212 when the blade 212 is in the upward position, but allows the blade 212 to be exposed when the blade 212 moves downwardly. This allows an individual to manipulate the paper crumpling apparatus 10, such as to replace parts or fix a paper jam, of the like, with reduced chance of being injured by the blade 212. Moreover, the safety sleeve 230 further protects the blade 212, increasing the lifespan of the blade 212.
In a further embodiment, a crumpling apparatus with a magnetic engagement/door mechanism is shown in
Pinch roller 246 is mounted on bracket 248. Bracket 248 connects to pivot shaft 250, which is also connected to door 254. The connection of bracket 248 and door 254 to pivot shaft 250 allows, under certain conditions, door 254 and bracket 248 to pivot relative to one another around the axis of pivot shaft 250. During normal operation the crumpling apparatus in this embodiment, bracket 248 is held to the underside of door 254 by means of a magnet 256 or similar attachment device. Multiple magnets may also be used, and the size, strength, and number of magnet(s) may vary depending on the strength of the attraction desired between the bracket 248 and the door 254. In addition, while the present embodiment describes one or more magnets, other like means may be utilized to hold the door 254 to the bracket 248, such as clips, hooks, hook-and-loop mechanisms (commonly referred to as VELCRO®), adhesives, or other like means.
The door 254 may have a handle 258 and, as describe above, may rotate around pivot shaft 250. When access to the crumpling zone 240 is desired by a user, technician, or other individual desiring access, the handle 258 may be lifted, causing the door 254 to rotate up and away from the crumpling zone 240, thereby allowing an individual to gain access to the crumpling zone. Pulling the handle 258 upwards disengages door 254 from bracket 248 by breaking the magnetic attraction of the magnet 256 to the door 254.
When door 254 is held by magnet 256 to bracket 248, door 254 is prevented from pivoting relative to bracket 248. In this configuration, guide roller 242 and pinch roller 246 may be considered rigidly attached to one another, because both are attached to the combination of door 254 and bracket 248 held together by magnet 256. This configuration allows pinch roller 246 and guide roller 242 to act in concert to provide traction to guide paper sheeting 252 as it traverses through the crumpling apparatus, so that paper sheeting 252 therein is crushed to form folds and/or pleats. The pinch roller 246 and guide roller 242 operate similarly to rollers described in previous embodiments.
The attraction between magnet 256 and door 254 also allows the pinch roller 242 to tighten against paper sheeting 252 as material tension increases. This may occur, for example, when paper sheeting 252 is fed from a new roll, when paper sheeting 252 traverses the apparatus at accelerating speed, or when required by the material properties of the particular paper feed stock.
As in previous embodiments, the guide roller 242 and the pinch roller 246 are interconnected via the pivot shaft 250. As tension increases on the guide roller 242, such as when the paper sheeting traverses the apparatus at accelerating speed, the increased tension on the guide roller 242 may cause it to pivot upwards, thereby causing a corresponding downward pivot of the pinch roller 246 against the paper sheeting 252, thereby increasing the traction of the pinch roller 246 and the paper sheeting 252. In an alternate embodiment, magnets or other like connecting mechanisms may not be used, and the pivot shaft may be tensioned, thereby providing the requisite downward force of the pinch roller 246 against the paper sheeting 252.
In the event that sufficient paper becomes trapped in the area of pinch roller 246, the present embodiment provides a mechanism for pinch roller 246 to automatically disengage from the paper sheeting, preventing further backup. This may conserve paper sheeting stock and prevent possible damage to components of the paper crumpling apparatus. In addition, if the handle 258 is lifted (shown in
As shown in
In the embodiment shown, blade 270 is secured within mounting blocks 276 by upper screws 278 and lower screws 280. Any number of screws or like fastening devices may be used, depending upon the desired blade 270 chosen, as well as the preferred mounting configuration. Optionally, mounting blocks 276 may contain any number of additional holes 282, which would allow the machine operator to use cutting blades of different length and/or blades which contain differently spaced mounting holes. The additional holes avoid the necessity of changing other components within the apparatus to accommodate a different blade.
As shown, upper screw 278 extends through mounting block 276 and blade 270, to the backside of blade 270 and the other end of the mounting block 276. The hole made in blade 270 to accommodate upper screw 278 may be made larger than strictly necessary to accommodate upper screw 278. Creating a larger hole in blade 270 further facilitates the ability of blade 270 to wobble or move within slot 274 of
Creating a larger than necessary hole through blade 270 to accommodate screw 278 may have the effect of allowing blade 270 to wobble slightly upwards in
The arrangement shown in
Exit zone 298 comprises a first exit roller 302, which may be connected to drive roller 244 by a belt 300. Belt 300 could also be a chain or similar mechanism suitable for driving rotation of first exit roller 302. Alternatively, first exit roller 302 may have its own independent drive mechanism. First exit roller 302 may have a clutch 304, which allows for first exit roller 302 to disengage from the rotational force provided by belt 300 and for first exit roller 302 to freely spin on its own. Clutch 304 can be “one-way,” allowing first exit roller 302 to freely rotate only in one direction. Allowing first exit roller 302 to disengage from the rotation provided by belt 300 allows for easier and safer clearing of paper that may be built up or jammed in the crumpling apparatus. When no rotational force is being provided to first exit roller 302, clutch 304 still allows for rotation of first exit roller 302, so that an operator may remove, any paper remaining in exit zone 298.
In addition, exit zone 298 ideally comprises a second exit roller 306 to help guide the crumpled and cut paper into a container (not shown). The use of a pair of exit rollers helps guide the leading edge of the paper through the exit of the apparatus. However, in place of exit roller 306, a frame, plate, or other structure may be used which, in conjunction with first exit roller 302, channels the paper to exit the crumpling apparatus.
As with the rollers in the crumpling zone, first exit roller 302 and second exit roller 306 may be comprised of any number of rollers, across some or all of the width of the entire paper crumpling apparatus. Further, first exit roller 302 and second exit roller 304 may be configured with optional features similar to the drive roller configurations discussed in previous embodiments of the present invention.
In
The paper crumpling apparatus, as described herein, allows a length of crumpled paper sheeting to eject from the paper crumpling apparatus, to be utilized in packing boxes or other containers having products contained therein, or for any other use apparent to one having ordinary skill in the art.
The present invention has been described above with reference to exemplary embodiments. However, those skilled in the art having read this disclosure will recognize that changes and modifications may be made to the exemplary embodiments without departing from the scope of the present invention.
The present invention is a Continuation-in-Part application of U.S. patent application Ser. No. 11/811,862, filed on Jun. 12, 2007, which claimed priority to U.S. Provisional Patent Application No. 60/844,565, filed on Sep. 14, 2006, U.S. Provisional Patent Application No. 60/853,585, filed on Oct. 23, 2006, and U.S. Provisional Patent Application No. 60/906,761c filed on Mar. 12, 2007, each of which is expressly incorporated herein in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| 60844565 | Sep 2006 | US | |
| 60853585 | Oct 2006 | US | |
| 60906761 | Mar 2007 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 12088166 | May 2008 | US |
| Child | 12824932 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 11811862 | Jun 2007 | US |
| Child | 12088166 | US |
