Abstract: A paper inlet safety protection device with an upper cover plate, a safety cover plate, a paper entrance block and an elastic component. The upper cover plate is connected with the upper cover plate, first end of the upper cover plate covers inlet of the paper entrance of the upper cove plate, paper entrance block is arranged toward the paper entrance and in the upper cover plate, and limits the second end of the safety cover plate, two ends of the elastic component connect with the inner wall of the upper cover plate and the paper entrance block respectively, the paper entrance block is connected fixedly with the second end, or integrated with the second end, or limits the studs arranged on the second end, the paper entrance block is positioned between the paper entrance and the elastic component, the safety cover plate is pivoted with the upper cover plate.

Abstract: The present invention relates to an anti-paper jam protection device for shredders comprising a paper thickness detecting device, an indicating device and a controlling device, wherein the paper thickness detecting device is an electromagnetic induction paper thickness detecting device comprising a contact element, an electromagnetic element and an electromagnetic induction element, the contact element is connected rotatably to the body of the shredder, one end of which is positioned in the paper inserting passage, on the other end of which is mounted the electromagnetic element, the electromagnetic induction element is mounted on the body of the shredder and spaced with the electromagnetic element face to face, and the controlling device is in line connection with the electromagnetic induction element, the present invention controls the thickness of the paper to be shredded during the paper inserting stage, and shreds paper automatically only in a predetermined value range, to avoid abnormalities that result

Abstract: A grinding composition for sharpening shredder blades of a shredder includes, based on total weight of the grinding composition, from 51 to 65 wt % of a grinding powder; from 5 to 35 wt % of a viscous grease agent; and from 3 to 30 wt % of at least one functional additive. A grinding sheet formed from the composition is used as a grinding product alone or in a bag. The composition is sealed in a bag and used as a grinding product. A process for manufacturing the latter grinding product employs an automatic form-fill-seal packaging machine. The shredder blades of a paper shredder are sharpened satisfactorily by the grinding composition as the grinding sheet or grinding product is shredded. The useful life of shredders is cost effectively extended while providing convenience in use that saves time and labor.

Abstract: The present invention relates to a paper inlet safety protection device for shredders comprising an upper cover plate, a safety cover plate, a paper entrance block and an elastic component, the upper cover plate is connected rotatably with the upper cover plate, the first end of the upper cover plate covers the inlet of the paper entrance of the upper cove plate, the paper entrance block is arranged slideably toward the paper entrance and in the upper cover plate, and limits/is connected with the second end of the safety cover plate, two ends of the elastic component are connected with the inner wall of the upper cover plate and the paper entrance block respectively, the paper entrance block is connected fixedly with the second end, or integrated with the second end as a whole, or limits the studs arranged on the second end, the paper entrance block is positioned between the paper entrance and the elastic component, the safety cover plate is pivoted with the upper cover plate, the present invention is designe

Abstract: The present invention relates to an anti-paper jam protection device for shredders comprising a paper thickness detecting device, an indicating device and a controlling device, wherein the paper thickness detecting device is an electromagnetic induction paper thickness detecting device comprising a contact element, an electromagnetic element and an electromagnetic induction element, the contact element is connected rotatably to the body of the shredder, one end of which is positioned in the paper inserting passage, on the other end of which is mounted the electromagnetic element, the electromagnetic induction element is mounted on the body of the shredder and spaced with the electromagnetic element face to face, and the controlling device is in line connection with the electromagnetic induction element, the present invention controls the thickness of the paper to be shredded during the paper inserting stage, and shreds paper automatically only in a predetermined value range, to avoid abnormalities that result

Abstract: The present invention relates to a new type protection device for shredders which comprises a paper number detecting device mounted at the paper inserting passage of the shredder, a warning device mounted on the shredder and a controlling device in line connection with the paper number detecting device and the warning device respectively, mounted in the shredder and in line connection with the driving component of the shredder driving the shredder blades, preferably the protection device further comprises an insert detecting device in line connection with the controlling device and mounted at the paper inserting passage, and at least one opaque shielding component mounted at the paper inserting passage and at the middle of which there is at least one slot along the length direction, the present invention controls the number of the paper to be shredded during the paper inserting stage, and shreds paper automatically only in a predetermined value range, to avoid abnormalities that result in failure of the machi

Abstract: The present invention relates to a new-type dual-passage paper feeding safety structure for shredders comprising a shredder upper lid, a dual-passage paper feeding safety cover plate and a touch safety switch, touch components are arranged on the dual-passage paper feeding safety cover plate, the shredder upper lid has a paper inlet corresponding to the dual-passage paper feeding safety cover plate and above the set of paper shredding blade shafts of the shredders, the dual-passage paper feeding safety cover plate is arranged in the paper inlet, the middle parts of two ends of the dual-passage paper feeding safety cover plate is connected rotatably with the shredder upper lid, the touch safety switch is fixed inside the shredder upper lid and cooperated with the touch components so that the touch components would touch the touch safety switch when the dual-passage paper feeding safety cover plate is rotated to open and work, more preferably, the middle parts of two ends of the dual-passage paper feeding safet

Abstract: The present invention provides a new-type thin shredder blade having blade points without steps, comprising at least one blade body and at least one cutting part that is located on the periphery of the blade body and includes a blade point, wherein the cutting part further comprises a protrusion which protrudes from the cutting part and includes a top, a inclined plane extends between the top and the blade point, and an acute angle is formed by the inclined plane and the blade body, preferably, the inclined plane is an inverted triangle, the cutting part further includes a first hemline and a second hemline extending respectively from the blade body and intersecting to the blade point, a first plane extends between the top and the first hemline and intersects with the inclined plane, the blade body includes at least one large protrusion which protrudes in the same direction as the protrusion, the blade sets formed by the above-mentioned new-type thin blades and the manufacturing method of the above-mentioned

Abstract: The present invention relates to a pins or staples removable structure of automatic shredders which comprises a shredder core, a paper press board assembly and a paper support board assembly fixed to the shredder core and arranged cooperatedly, and a clamping device, the paper support board assembly comprises a paper support board and a pick-up mechanism mounted to the paper support board, the clamping device is fixed to the paper press board assembly and the shredder core/the paper support board respectively, for clamping the paper to be shredded to the paper support board during the process of shredding paper, the paper support board has a paper inlet above the blade assembly of the shredder core, the distance between the outer end of the paper support board and the outer end of the pick-up mechanism for clamping the paper to be shredded is less than the length of the whole paper to be shredded, the pins or staples removable structure of automatic shredders further comprises a magnet positioned in the outer

Abstract: The present invention relates to an automatic shredder without choosing the number of paper to be shredded which comprises a shredder core and an automatic paper feeding device, the automatic paper feeding device comprises a driving mechanism, a paper support box, a pick-up mechanism and a paper press box, the driving mechanism is fixed on the shredder core and connected with the pick-up mechanism for driving the pick-up mechanism, the paper support box comprises a first zone and a second zone, the pick-up mechanism is positioned between the first zone and the second zone and fixed to the paper support box, and its paper feeding direction is towards the second zone, one end of the paper press box is pivoted with the paper support box, the other end of the paper press box is connected detachable with the paper support box, the paper support box is fixed on the shredder core, and the second zone has a paper inlet positioned above the blade assembly of the shredder core, a magnet is positioned in the first zone,