The present invention is generally related to an apparatus having cutter elements for destroying articles such as paper sheets and a mechanism for advancing at least a top sheet from a stack of paper in a tray into the cutter elements for shredding. In one embodiment, the apparatus uses a rotatable
The present invention is generally related to an apparatus having cutter elements for destroying articles such as paper sheets and a mechanism for advancing at least a top sheet from a stack of paper in a tray into the cutter elements for shredding. In one embodiment, the apparatus uses a rotatable feed roller to feed paper atop the stack to the cutter elements. The feed roller moves in an alternating manner between a lowered and raised position to engage and disengage the stack when advancing the paper therethrough. Alternatively, a rotatable cam may be used. In an embodiment, the apparatus uses a rotatable drum or rotatable belt with an internal vacuum to lift paper from the stack and feed into the shredder mechanism.
대표청구항▼
What is claimed is: 1. A shredder comprising: a housing; a paper shredder mechanism received in the housing and including a motor and cutter elements, the motor rotating the cutter elements in an interleaving relationship for shredding paper sheets fed therein; a tray for holding a stack of paper s
What is claimed is: 1. A shredder comprising: a housing; a paper shredder mechanism received in the housing and including a motor and cutter elements, the motor rotating the cutter elements in an interleaving relationship for shredding paper sheets fed therein; a tray for holding a stack of paper sheets to be fed into the cutter elements; a moveable paper feed mechanism positioned above the tray, the moveable paper feed mechanism having an exterior paper engaging surface that is at least in part air permeable and rotatable; a vacuum generator for applying a vacuum to an interior of the moveable paper feed mechanism to draw air through the exterior paper engaging surface, thereby lifting at least a top sheet from atop the stack, and a feed driver system constructed to drive the feed mechanism by rotating the exterior paper engaging surface to feed the at least lifted top sheet to the cutter elements. 2. A shredder according to claim 1, wherein the moveable paper feed mechanism comprises a rotatable drum. 3. A shredder according to claim 2, wherein the rotatable drum is mounted on an axle, and the feed driver system comprises a rotary driver for rotating the axle so that the rotation of the drum feeds the paper atop the stack to the cutter elements. 4. A shredder according to claim 2, wherein the rotatable drum further comprises an inner cylinder for applying the vacuum and an outer cylinder having the exterior paper engaging surface, the outer cylinder comprising at least one opening for applying the vacuum, wherein, during rotation, the opening of the outer cylinder provides a concentrated vacuum toward the sheets of the stack. 5. A shredder according to claim 1, further comprising a fan mechanism constructed and arranged to provide air toward the tray to lift at least an edge of at least the lifted top sheet of the stack and thereby separate the at least lifted top sheet from the stack and into contact with the exterior paper engaging surface. 6. A shredder according to claim 5, wherein the fan mechanism utilizes the exhaust from the vacuum generator. 7. A shredder according to claim 1, wherein the moveable feed mechanism comprises a belt. 8. A shredder according to claim 7, wherein the belt is mounted on two parallel axles, and the feed driver system comprises a rotary driver for rotating the axles so that the rotation of the belt feeds the at least lifted top sheet from atop the stack to the cutter elements. 9. A shredder according to claim 1, wherein the tray includes a curved feed bed curved upwardly and forwardly towards the shredder mechanism to assist in feeding one or more sheets in a forward and upward direction into the shredder mechanism. 10. A shredder according to claim 1, wherein the rotation of the feed mechanism is activated using a device selected from the group consisting of an optical sensor, electromechanical sensor, and switch. 11. A shredder according to claim 1, wherein the driver system comprises a timer for controlling at least a time to start operation of the feed driver system and the vacuum generator. 12. A shredder according to claim 1, further comprising a pivotable lid for covering the tray. 13. A shredder according to claim 12, further comprising a safety switch for detecting if the lid is pivoted to an open position, the safety switch being coupled to the shredder mechanism and constructed and arranged to prevent operation of the cutter elements when the lid is in the open position. 14. A shredder according to claim 1, further comprising a lid for covering the tray, the lid comprising an opening for allowing insertion of paper sheets into the tray. 15. A shredder according to claim 1, wherein the shredder further comprises a device for stripping paper sheets that are stapled together in the stack as at least the top sheet of the paper sheets are fed to the cutter elements. 16. A shredder according to claim 1, wherein the shredder further comprises a waste bin for receiving paper shreds from the cutter elements. 17. A shredder according to claim 1, further comprising a paper removal device between the feed driver system and the shredder mechanism to assist in a removal of the at least lifted top sheet from the exterior paper engaging surface of the feed mechanism. 18. A shredder according to claim 17, wherein the paper removal device is positioned adjacent to the exterior paper engaging surface. 19. A shredder according to claim 1, wherein the moveable paper feed mechanism is further positioned adjacent the shredder mechanism. 20. A method for advancing paper sheets into cutter elements for shredding comprising: providing a tray for holding a stack of paper sheets; providing a moveable paper feed mechanism positioned above the tray, the moveable paper feed mechanism having an exterior paper engaging surface that is at least in part air permeable and rotatable; applying a vacuum to an interior of the moveable paper feed mechanism to draw air through the exterior paper engaging surface, thereby lifting at least a top sheet from atop the stack to the exterior paper engaging surface of the drum; rotating cutter elements in an interleaving relationship for shredding paper sheets fed therein; and driving the feed mechanism by rotating the exterior paper engaging surface to feed the at least lifted top sheet to the cutter elements. 21. A method according to claim 20, wherein the moveable paper feed mechanism comprises a rotatable drum. 22. A method according to claim 21, further comprising mounting the rotatable drum on an axle and rotating the axle so that the rotation of the drum assists in feeding the at least lifted top sheet from atop the stack to the cutter elements. 23. A method according to claim 20, wherein the moveable paper feed mechanism comprises a rotatable belt. 24. A method according to claim 23, further comprising mounting the rotatable belt on two parallel axles and rotating the axles so that the rotation of the belt assists in feeding the at least lifted top sheet from atop the stack to the cutter elements. 25. A method according to claim 20, further comprising further comprising rotating a fan mechanism to supply air to lift at least an edge of the at least lifted top sheet from atop the stack and thereby separate the at least lifted top sheet from the stack and into contact with the exterior paper engaging surface. 26. A method according to claim 20, further comprising activating the rotation of the moveable paper feed mechanism using a device selected from the group consisting of an optical sensor, electromechanical sensor, and switch. 27. A method according to claim 20, further comprising controlling at least a start time for operating the vacuum generator and driving the feed mechanism using a timer. 28. A method according to claim 20, further comprising detecting if a lid of the tray is pivoted to an open position, and preventing operation of the cutter elements if the lid is in the open position. 29. A method according to claim 20, further comprising removing the at least lifted top sheet from the exterior paper engaging surface of the feed mechanism using a paper removal device positioned between the feed driver system and the shredder mechanism. 30. A method according to claim 29, wherein the paper removal device is positioned adjacent to the exterior paper engaging surface. 31. A method according to claim 20, wherein the moveable paper feed mechanism is further positioned adjacent the shredder mechanism.
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이 특허에 인용된 특허 (13)
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Carson, Steven; Matlin, Tai Hoon K.; Applegate, Shawn Michael; Gruber, Dennis William; Surati, Dipan Pravin, Shredder with paper separation and advancement mechanism.
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