This technology relates to a destruction validation system. The destruction validation system includes a destruction device and a controller. The controller is configured to monitor current drawn by the destruction device during destruction of the piece of physical media. The controller may compare the current drawn to a current profile. Based on the comparison of the current drawn to the current profile, the controller may generate and output a notification indicating whether the piece of physical media has been destroyed. In some instances, the destruction device includes a current sensing device. The current sensing device may be configured to detect the current drawn by the destruction device and transmit the detected current drawn to the controller. The current drawn that is monitored by the controller may be the detected current drawn by the current sensing device.

A sheet shredding device includes a stacking unit configured to stack paper; a cutting unit configured to cut paper supplied from the stacking unit; a transferring unit configured to transfer paper from the stacking unit to the cutting unit; and removing units configured to remove a binder attached to the paper. The removing units are provided so as to overlap in a transfer direction of the paper along a transfer path of the paper from the stacking unit to the cutting unit.

A shredding machine for domestic or office use having a feed passage 3 leading to a cutting mechanism 10, 11 powered by an electric motor, has a thickness measuring device 15 for measuring the thickness of bundles of paper fed through the feed passage and the machine is controlled by a microprocessor which receives signals from the thickness measuring device and prevents the cutting mechanism from being energised if the thickness measured is above a threshold determined by the microprocessor. The thickness gauging device is deactivated during shredding until the material is shredded so that rippling or flapping of the material within the feed passage will not cause false readings as to the amount of material inserted into the feed passage.

A sheet shredding device includes a stacking unit configured to stack paper; a cutting unit configured to cut paper supplied from the stacking unit; a transferring unit configured to transfer paper from the stacking unit to the cutting unit; and removing units configured to remove a binder attached to the paper. The removing units are provided so as to overlap in a transfer direction of the paper along a transfer path of the paper from the stacking unit to the cutting unit.

A machining method of a shredding cutter includes providing a cutter shaft and a plurality of blades; arranging the plurality of blades on the cutter shaft in a predetermined spacing; and rolling or extruding intervals of the cutter shaft between the blades to shift some materials thereof from middle toward both sides and squeeze the materials onto flanks of the blades to form embossed parts so that the blades are embedded in the embossed parts and clamped by the embossed parts, thereby fixing the blades onto the cutter shaft. The shredding cutter has a strong unitary structure, high precision, high yield, which is beneficial to reduce the processing cost and the cost of materials.

A paper shredder having shredder cover and a motor coupled to shredder blades includes a shredder throat coupled to an inlet in the shredder cover and in proximity to shredder blades. The shredder throat has a moveable throat blade, which widens the shredder throat. An anti-jam switch, which when activated causes the motor to advance the shredder blades to clear a jam in the widened shredder throat. The jam clearing mechanism can be automatic or manual, as by push-button or turn-knob linkages. A method for recovering from a shredder jam in a paper shredder is provided, including providing a moveable throat blade; sensing a shredder throat jammed condition; releasing the moveable throat blade; moving the moveable throat blade to a wide gap position; sensing the moveable throat blade in the wide gap position; advancing shredder blades in response to the sensing, by which the jammed condition is cleared.

A document shredder is disclosed including a paper receptacle for receiving a load of paper and a shredding assembly. A metering assembly is interposed between the paper receptacle and the shredding assembly and is configured to separate a portion of the load of paper from the load of paper and permit the portion of the load of paper to move into the shredding assembly. The metering assembly may include a stop plate secured thereto and defining a lifting portion on a perimeter portion thereof. The lifting portion is configured to engage a lower edge of the portion of the load of paper upon rotation of the stop plate and lift the paper over the stop plate. The lifting portion may include a flange, which may be a portion of a cone, formed on a perimeter portion of the wheel and occupying a sector of the perimeter of less than 60 degrees.

A shredding machine for domestic or office use having a feed passage 3 leading to a cutting mechanism 10, 11 powered by an electric motor, has a thickness measuring device 15 for measuring the thickness of bundles of paper fed through the feed passage and the machine is controlled by a microprocessor which receives signals from the thickness measuring device and prevents the cutting mechanism from being energized if the thickness measured is above a threshold determined by the microprocessor. The microprocessor varies the threshold in accordance with electrical supply voltage, the electric motor temperature and the electric current drawn by the motor during a previous shredding operation, so that the maximum thickness the shredder will accept can be reduced automatically when motor temperature increases or as the effectiveness of the machine deteriorates throughout its working life.

A shredder has cutter elements for destroying articles (paper) and a feed mechanism for advancing paper from a stack in a tray into cutters for shredding. The feed mechanism has a feed member provided adjacent to the tray with an elastic arm for engaging and disengaging the stack. The feed member rotates in a feeding direction about an axle, with the elastic arm elastically deforming to apply pressure to feed paper atop the stack to the cutters. The elastic arm can include a protruding tip that is inserted into the stack. The tray includes a curved feed bed to assist in feeding paper into the cutters and deforming the elastic arm. A pivot arm can also move the feed member relative to the tray (e.g., vertically). A disengagement mechanism can hold the feed mechanism in an inoperable feeding position when a drawer or tray is moved into an open position.

A sheet shredding device includes a stacking unit configured to stack paper; a cutting unit configured to cut paper supplied from the stacking unit; a transferring unit configured to transfer paper from the stacking unit to the cutting unit; and removing units configured to remove a binder attached to the paper. The removing units are provided so as to overlap in a transfer direction of the paper along a transfer path of the paper from the stacking unit to the cutting unit.