Abstract: The present invention provides a slidable cover mechanism of a paper shredder, wherein an upper cover of the paper shredder is provided with a face cover sliding along an upper surface of the upper cover, two sides at a bottom of the upper cover are provided respectively with a first chute and a second chute, two sides at a bottom of the face cover are provided with guiding pillars, the guiding pillars are disposed respectively in the first chute and the second chute, a first pressing plate and a second pressing plate are connected respectively above the first chute and the second chute on the guiding pillars, an exterior side of the first chute is provided with a micro-switch at a bottom of the upper cover, and an extension arm is provided between a side of the first pressing plate and the micro-switch.

Abstract: The present invention discloses a smart speed control, power-saving and noise-reduction paper shredder, comprises an electric machine unit, a current inspection feedback unit, a gear-switching voltage-modulating and speed-regulating unit and a power supply, wherein an input terminal of the gear-switching voltage-modulating and speed-regulating unit is connected to an output terminal of the current inspection feedback unit, and an output terminal is connected to an input terminal of the electric machine unit; a paper shredder of the present invention applicable for an AC electric machine, an induction electric machine or a DC electric machine, wherein current required for paper shredding by the AC electric machine, the induction electric machine or the DC electric machine is detected, and the electric machine is adjusted to its best working condition, and a number of speeds including high, mid and low gears are provided and can be switched according to the actual load condition, so as to achieve the smart spee

Abstract: An anti-jam knife device for a paper shredder is characterized in that a circular parting wheel is provided on a blade shaft and is closely adjacent to a guide-parting plate, with an outer diameter of the parting wheel being higher than a parting knife-edge at a bottom of a notch of the guide-parting plate. Therefore, when shredding plural pieces of paper, the paper is cut first by the guide-parting plate associated with the parting wheel, and is then shredded by plural original sets of blades to prevent from paper jam.

Abstract: A guide-cutting sheet of a cutting wheel for a paper shredder is characterized in that two sides of a centerline of a planar linear guide-cutting sheet are opened respectively with blade shaft transfix holes corresponding to a spacing between the blade shafts of two parallel cylindrical rotary cutting wheels; below or above two blade shaft transfix holes are opened respectively with fixing rod transfix holes, corresponding to a spacing between two fixing rods; the centerline part above two blade shaft transfix holes is opened with a rabbet which can be latched at two aperture walls of a strip-shape aperture on a face cover; and a bottom of the rabbet is provided with a concaved knife-edge which can cut off paper sheets.

Abstract: A paper shredder which prevents cutting fingers is composed of a plurality of stops at two sides of a slot hole of a rack of two blade tools inside the paper shredder. The stops, which are aligned in alternation, are emplaced respectively between two blades. When a paper drop opening at a bottom cap is aligned with the slot hole of the rack, the stops will limit space the paper drop opening extending into the blade tool, which prevents from inserting fingers into the paper drop opening to be cut by the blade tool, and also prevents from putting in extraneous material to cause malfunction of the paper shredder.

Abstract: A paper shredder blade includes a pair of cylindrical hobs, and each hob includes a polygonal shaft sheathed with many differential blades, allowing the differential blades to be assembled alternately. Each differential blade has two secondary blades, and an inner side of each secondary blade contains many bumps surrounding an inner rim of the secondary blade to increase a thickness and an intensity of the blade. Two abutted secondary blades are formed into one set of differential blade by abutting the bumps with the bumps, to save more than a half of materials of the differential blade, and to reduce a weight correspondingly. A cut-off edge of each secondary blade contains a reinforcing rib, allowing the edge to be thicker than the cut-off edge of an ordinary paper shredder. Therefore, when cutting off paper, the paper will not be jammed easily and can be cut off easily.

Abstract: A combinative cutting wheel of a rotary cutter of paper shredder is composed of two sets of edge rings having cutting edges on outer rings thereof, and a plastic base ring having a spacer. A center of the aforementioned plastic base ring is provided with a shaft hole which can fit with a polygonal shaft rod. The two sets of edge rings are abutted on each other and then latched on the plastic base ring to form an integral body. The two edge rings constituting the cutting wheel are pre-installed on the plastic base ring having the spacer to form an integrated cutting wheel having the spacer, enabling the two blades and the spacer which would be installed separately to become one component, so as to simplify an assembling procedure for the rotary cutter.

Abstract: An auxiliary unit of paper shredder cutting tools is installed on cutting tools of a paper shredder. The auxiliary unit is formed by two L-shape plates located between two neighboring blades, an arc-shape hole at an end of each L-shape plate is hooked on a cutting bar of the cutting tool, and a through-hole of each L-shape plate provides for a support rod to be transfixed, so as to stably fix paper guides, the cutting bars and the blades. Therefore, the paper guides, the cutting bars and the blades can be prevented from getting loose or stretched open to damage the paper shredder or result in noise or even an imperfect shredding effect.

Abstract: The present invention provides a foot-driven device for displacing a paper shredder bin, and is a separable paper shredder bin structured from an outer frame and an inner bin. A front edge of a bottom portion of the outer frame is provided with a foot pedal. The inner bin is caused to lean outward when a user steps on the foot pedal to facilitate throwing waste into the inner bin.

Abstract: A safety switch of a paper shredder is a safety switch that is installed on an ordinary paper shredder. Another magnet is installed on a scrap paper bin or a door panel, and by using a magnet to repulse or attract a magnetic block inside the safety switch, power is shut off at a same time when the scrap paper bin is pulled out or the door panel is opened for taking out the scrap paper bin.

Abstract: A new and novel split shredder bin includes a frame and an inner bin, wherein only the inner bin needs to be pulled out to remove shredded paper therein instead of removing the shedder as in the prior art.

Abstract: A paper shredder cutting tool having multiple cutting edges (-) constructed from a pair of cylindrical rotary cutters, which are each separately mounted on a polygonal shaft, and a plurality of cutting blades are securely mounted on the shafts. A paper guide is configured between each pair of adjacent cutting blades, thus partitioning the cutting blades therebetween, and thereby allowing the cutting blades to be assembled and mounted in an interleaving fashion on the two cylindrical rotary cutters. Moreover, each of the cutting blades is further constructed from a pair of blades. Having a plurality of cutting edges circumferentially arranged and minimally separated on each of the pair of blades, thereby forming a compact assembly of blade edges. The paper shredder cutting tool provides capability to feed around tens sheets of paper or cardboard at one time, thereupon being rapidly shredded into small bits.

Abstract: A blade for a paper shredder cutting tool that includes an improved structure for one of two blades of each cutter of two rotary cutters of a paper shredder cutting tool. A protruding ring protrudes from a rim of a center hole of the blade, and the protruding ring and the blade are formed as an integrated body. The protruding rings not only enable disposition of paper chaff guides, but also will not deform because of thermal expansion and contraction when shredding paper, thereby preventing a gap from forming between the two blades, and thus the occurrence of paper jamming or wedging together of the blades of the upper and lower cutters.

Abstract: An emergency stopping safety device includes an emergency switch and an emergency light. When children accidentally put their fingers into a paper feeder of a paper shredder, the paper shredder can be temporarily disabled by pressing a button of the emergency switch immediately, and the emergency light blinks as warning signal.

Abstract: A paper shredder paper feed mechanism, characterized in having a paper insert opening structured from two movable paper feed tubes, which are configured above paper shredding cutters. Two ends of each of the paper feed tubes are respectively positioned in W-shaped embed grooves of positioning plates of a frame. The two paper feed tubes are ordinarily closed together, thereby enhancing safety and preventing dust and miscellaneous objects from falling into the paper shredder. When paper is inserted into the paper insert opening, the thickness of the paper opens the two paper feed tubes, thereby guiding the paper smoothly guided into the paper shredding cutters.

Abstract: A paper shredder cutting tool according to the present invention includes two sets of rolling blades that are parallel and side-by-side to each other. Wherein, several blade modules are configured correspondingly. Each blade module is consisted of a smooth first plate-shaped blade and an adjacent curved second plate-shaped blade to form the circumferences of the blade modules as asymmetrical blade tips for slicing the papers into asymmetrical and small pieces. Furthermore, the curved side of the blade tip is non-parallel to paper input direction to provide dragging effects and thus preventing paper jam.