Patent Application
20070257147
The present invention relates generally to dispensers adapted for dispensing paper from a roll and, more particularly, to a motorized dispenser for dispensing an adhesive note paper.
Adhesive note paper, such as POST-IT® note paper by 3M Company of St. Paul, Minn., includes sheets of paper having a low-tack pressure-sensitive adhesive on the back of each sheet. The pressure-sensitive adhesive allows a user to removably adhere the note paper to a surface, such as a document that the user wishes to associate a note without marking the document by writing directly on the document. The low-tack pressure-sensitive adhesive allows for subsequent removal of the note paper from the surface without resulting damage to the surface. The sheets of adhesive note paper are provided in stacks from which individual sheets are removed.
It is also known, as disclosed in U.S. Pat. No. 5,904,283 (Kanbar), to provide a roll of adhesive note paper. The note paper of the roll includes a band of low-tack adhesive on one side of the note paper. Kanbar also discloses a dispenser for dispensing the adhesive note paper from the roll. The note paper is directed from the roll, which is rotatably mounted on a shaft, onto a motor-driven conveyor belt such that the note paper adheres to the belt. A dispenser for dispensing an adhesive note paper from a roll having an endless conveyor belt onto which the paper is directed is also disclosed in U.S. Pat. No. 4,327,875.
According to the present invention, a dispenser for dispensing an adhesive note paper from a roll comprises a housing defining an interior and a discharge opening. The roll of adhesive note paper is rotatably mounted within the interior of the housing. The dispenser also comprises a drive system including a roller rotatably mounted within the housing interior and a motor engaging the roller to rotate the roller with respect to the housing about a central axis of the roller. The dispenser further comprises a pressure member located within the housing interior and movable with respect to the roller of the drive system between an engaged position and a disengaged position. The pressure member is adapted to create pressure between the pressure member and the roller in the engaged position.
According to one embodiment of the invention, the roller is rotatably mounted on an outer surface of a mounting tube and the motor of the drive system is located within the roller inside the mounting tube.
The dispenser includes a drive system actuator for actuating the drive system motor. In one embodiment, the actuator preferably includes a button arranged for activation by a user, such as depressing the button relative to the housing. The actuator includes first and second electrical contacts arranged for contact with each other when the button is depressed by the user with respect to the housing. The contact between the electrical contacts closes a circuit, thereby activating the drive system motor.
The electrical contacts of the actuator may be secured to the pressure member and arranged such that the depressing of the actuator button results in contact between the actuator contacts.
According to another aspect of the invention, an adhesive note paper dispenser comprises a roll of an adhesive note paper having a pressure-sensitive adhesive on one side of the paper and a paper driving system. The paper driving system includes a roller rotatably supported for rotation about a central axis of the roller and a motor. The roller includes a body defining a substantially cylindrical outer surface and an interior. The motor is located within the interior of the roller body and has an output shaft engaging the roller to transfer rotation of the output shaft to the roller. The dispenser also comprises a pressure plate supported for movement between a disengaged position in which the pressure plate is separated from the roller and an engaged position. In the engaged position, the pressure plate urges the adhesive note paper against the outer surface of the roller, thereby causing the roller to drive the adhesive note paper.
For the purpose of illustrating the invention, the drawings show a form of the invention that is presently preferred. However, it should be understood that this invention is not limited to the precise arrangements and instrumentalities shown in the drawings.
Referring to the drawings, where like numerals identify like elements, there is illustrated in the figures a dispenser 10 for dispensing an adhesive note paper according to the present invention. The adhesive note paper may be of the type disclosed in U.S. Pat. No. 5,904,283 including a roll of paper strip having a band of a low-tack pressure-sensitive adhesive extending longitudinally along the center line of the paper strip. U.S. Pat. No. 5,904,283 is incorporated herein by reference in its entirety. It is, however, contemplated that the adhesive roll can be arranged differently, including multiple strips of adhesive, or adhesive strips located along one edge as opposed to the center.
Referring to
The dispenser 10 includes a drive system 20 for directing the adhesive note paper 22 outwardly from the housing 12 via the discharge opening 18. As discussed above, the adhesive note paper 22 is preferably provided in the form of a roll 24 that is located within the housing interior. The drive system includes a roller 26 rotatably supported within the interior of housing 12. The roller 26 includes a body 28 having a substantially cylindrical outer surface adapted for contact with the paper 22, in the manner described below, to drive or pull the paper from the roll 24. The drive system 20 in the illustrated embodiment includes a roller mounting tube or support 30 preferably having a substantially cylindrical outer surface. In the illustrated embodiment, the body 28 of the roller 26 is open at a first end of the roller 26 for receipt of the mounting tube 30 within the roller 26. As will be discussed below, this arrangement permits relative rotation between the roller 26 and the mounting tube 30 about a central axes of the roller 26.
Referring to
The roller 26 includes an end wall 36 at a second end of the roller 26 opposite the open end of the body 28. An annular fitting 38 included on an outer surface of the end wall 36 is slidably received by an opening 40 defined by the second bracket 34. The slidable receipt of the annular fitting 38 by the bracket opening 40 provides rotatable support for second end of the roller 26. In this manner, the roller 26 is rotatably supported at the second end of the roller 26 by the second bracket 34 and over the rest of the roller 26 by the mounting tube 30, which is in turn supported by the first bracket 32.
Referring to
Although the depicted dispenser 10 includes a mounting tube 30 as described above, it is conceivable that the roller 26 could be rotatably supported by the brackets 32, 34 at the opposite ends of the roller 26 without a mounting tube. In such an alternative construction, the motor and/or the output shaft would be positioned within the interior of the roller 26 and a roller-engaging element, such as drive wheel or socket, would engage the output shaft of the motor to an inner surface of the roller. The motor, in turn, would be supported by at least one of the brackets such that the motor does not rotate.
Referring back to the figures, the dispenser 10 includes a pressure member 48 supported within the interior of the housing 12. Although not a requirement, the pressure member 48 could be designed so as to provide movement between engaged and disengaged positions with respect to the roller 26. As described below, the adhesive paper 22 is received between the pressure member 48 and the body 28 of roller 26 such that, the pressure member 48 presses or urges the paper against the outer cylindrical surface of the roller body 28. The pressure generated between the pressure member 48 and the roller 26 causes the adhesive to adhere to the roller 26, thus permitting the rotation of the roller to drive the adhesive paper 22 between the roller 26 and the pressure member 48.
The pressure member 48 includes an elongated plate portion 50 having a lower surface, from the point of view shown in
The dispenser 10 includes a spring or biasing device 56 for urging the pressure member 48 towards the engaged position. The depicted spring 56 is a hair spring having a coil portion and first and second legs extending from the coil portion. The first leg is secured to the second bracket 34. The second leg is engaged with an opening formed in one of the flanges 52 of the pressure member 48. Arranged in this manner between the pressure member and the bracket, the spring functions to urge the plate portion 50 of the pressure member 48 down during normal operation. The spring is positions such that, when the pressure member 48 is raised to its disengaged position, the pressure exerted goes over center, thus holding the pressure member 48 in its raised position. When the pressure member 48 is then lowered, the spring tension goes past center and urges the pressure plate 48 against to roller. Other mechanisms can be used to bias the pressure member into its engaged position, such as a compression spring, coil or leaf spring. Furthermore, the spring need not be a separate element. It is contemplated that the spring can be formed as an integral part of the pressure member or the brackets.
The dispenser 10 includes a drive system actuator 58 for controlling the operation of the drive system 20. The drive system actuator 58 includes first and second electrical contacts 60, 62 preferably secured to an upper surface of the plate portion 50 of pressure member 48. The electrical contacts 60, 62 are adapted to close an electrical circuit when they contact each other such that current is directed to the motor 42 of drive system 20 from a source of power. In the depicted embodiment, the power source is provided by batteries located within a battery compartment 64 on the bottom 82 of the housing base 16. However, the power course could be any conventional power source, such as an AC current source. In the illustrated embodiment, the first electrical contact 60 includes an elongated arm having a distal end located above the second electrical contact 62. The arm of the first electrical contact 60 is adapted to flex to move the distal end of the first electrical contact 60 into contact with the second electrical contact 62. The contacts 60, 62 are arranged such that they are normally out of contact with each other so that the motor is normally not powered to rotate the roller 26. The electrical connection of the contacts between the motor and the power source is otherwise conventional and, therefore, no further discussion is needed.
The drive system actuator 58 also includes a button 66 adapted for contact by a user to activate the drive system 20 of the dispenser 10. The button 66 is located in an opening 68 formed in the housing cover 14 preferably at or near the top of the housing 12 such that the button contacts the distal end of the first electrical contact 60 of the actuator 58. Arranged in this manner, the button 66 functions to flex the first electrical contact 60 when the button 66 is depressed by the user with respect to the housing cover 14 causing the first electrical contact 60 to contact the second electrical contact 62.
The dispenser preferably includes an axle 70 for supporting a roll 24 of adhesive note paper within the interior of the housing 12. The axle 70 is adapted to extend through a central opening of the roll 24 and has opposite ends that are removably received in channels 72 formed on the brackets 32, 34. Each of the channels 72 includes a tower portion 74 extending from an edge of the associated bracket 32, 34 to provide for placement of the axle 70 into the brackets 32, 34, or removal of the axle 70. Each channel also includes a second portion 76 extending vertically from the lower portion 74. The vertical portions 76 of the channels 72 are, in the illustrated embodiment, flexible springs which use the inherent resiliency of the material (plastic in this embodiment) to act as detents to hold the axle in place. The vertical portions may be designed to provide automatic adjustment of the height of the axle 70 above the base 16 as the size of the roll is diminished by discharge of the paper.
The dispenser 10 preferably includes an exit guide 78 having opposite ends secured to the brackets 32, 34 adjacent the discharge opening 18. The exit guide 78 is adapted to guide the adhesive note paper being driven from the roll 24 by the drive system 20 towards the discharge opening 18.
The dispenser 10 includes a tear bar 80 preferably attached or formed on the lower surface of the plate portion 50 of pressure member 48. The tear bar 80 is located adjacent to the discharge opening 18. The tear bar 80 includes a relatively sharp edge that facilitates tearing of the note paper when the paper is pulled transverse to the opening. Preferably, the tear bar 80 is secured to the pressure member 48 by welding (e.g., heat staking) the tear bar to the plate portion 50 of the pressure member 48. However, it is also contemplated that the tear bar 80 may be a sharp edge that is formed integral with the pressure member.
The base 16 includes a bottom plate 82 and an upstanding wall 84. In the depicted embodiment, the bottom plate 82 of the base 16 is secured to the wall 84 by fasteners. However, it is also contemplated that the entire base can be molded as a single piece. The cover 14 of housing 12 preferably includes attachment tabs 86 on opposite sides of the cover 14 that are designed to engage with channel guides 88 located on opposite sides of the base wall 84. The dispenser 10 may also include a cover retension spring 90 having projections 92 on opposite arms of the spring 90. The projections 92 on the cover retension spring 90 are received in openings 94 formed in the cover tabs 86 for retaining the cover 14 of the housing 12 on the base 16.
The spring 90 is designed such that when pressure is applied to its center point, due to the location of the pivot points in the bottom cover, the latching tabs 92 are withdrawn from the slots in tabs 86. The center release point of the spring 90 is accessed through a hole in the plate 83 that is aligned with the center release point. The center release point includes a button for the user to push on the depress the spring 90.
While the motor in the illustrated embodiment is shown mounted within the roller, it should be readily apparent that the motor can be positioned outside the roller and include a mechanism, such as a belt, gear or direct interconnection to rotate the roller.
One of the features of the design is the ability to utilize the adhesive on the paper to facilitate drawing or movement of the paper out of the dispenser. The adhesive contacts the roller and provides sufficient adhesion to allow the roll to pull the paper off the roll. The pressure plate assists in the causing the paper to adhere to the roll.
The foregoing describes the invention in terms of embodiments foreseen by the inventor for which an enabling description was available, notwithstanding that insubstantial modifications of the invention, not presently foreseen, may nonetheless represent equivalents thereto.
