A flywheel and paddle assembly for a chipping or shredding apparatus, including a wood chipper, a brush chipper, and a leaf shredder. The assembly has a flywheel attached coaxially to a drive shaft. The flywheel has at least one aperture extending from the front side to the back side, and carries at least one knife adjacent to the at least one aperture. The knife presents a knife edge on the front side of the flywheel. A paddle is rotatably mounted coaxially to the drive shaft adjacent to the back side of the flywheel. The paddle is configured to rotate on the drive shaft independently of the flywheel. A chipping or shredding apparatus incorporating the aforesaid flywheel and paddle assembly is also disclosed.

An infeed system of a chipper or grinder includes a feed roller, a motor for rotating the roller, a hydraulic cylinder for adjusting an amount of crush force applied by the roller, a sensor, and a controller in data communication with the sensor and the cylinder. In operation, the controller determines whether the material is being effectively moved to the processing portion and whether the amount of crush force is at a maximum or lowest setting. The controller causes the cylinder to: (a) decrease the amount of crush force when the material is being effectively moved to the processing portion and the amount of crush force applied is not at the lowest setting; and (b) increase the amount of crush force when the material is not being effectively moved to the processing portion and the amount of crush force is not at the maximum setting.

An automatic paper shredder includes a shredder cover, a paper holding box, a shell, a paper holding plate, a paper holding plate inlet, a paper shredding component, a drive motor, a paper pressing plate, a paper pick-up component, and a waste paper bin. The paper pressing effect is improved through a spliced paper pressing plate, and the paper pick-up effect is improved through a damping plate, a soft rubber piece, and a convex rib, and thus, efficiency is improved. The automatic paper shredder has the characteristics of being highly automated, convenient to use, safe, reliable, structurally simple and cost-effective.

A paper shredder has a paper tray, a paper inlet, a shredder cover, a paper pressing plate, paper pick-up rollers, a shredder cutter shaft, a motor, a wastepaper barrel, and a paper limiter. The paper tray carries a stack of to-be-shredded paper. The paper inlet guides to-be-shredded paper. The shredder cover end is connected to the shredder body by a rotary shaft, closing or opening the shredder body. The paper pressing pl presses the stack in the paper tray. The paper pick-up rollers are on one side of the paper inlet, feeding the paper tray stack into the paper inlet. The shredder cutter shaft shreds the to-be-shredded paper. The motor drives the shredder cutter shaft to operate. The wastepaper barrel is located below the paper inlet to collect shredded paper. The paper limiter is limits one of a thickness or a length of the stack placed in the paper tray.

A paper shredder capable of feeding paper laterally, a paper holder, a curved paper box, a paper pick-up assembly, and a paper shredding assembly. The paper holder connects with the curved paper box. A paper holding plate is disposed on an upper surface the paper holder close to the curved paper box, and the first paper holding plate and/or the second paper holding plate incline downwards toward the paper inlet. The paper pick-up assembly is disposed in the first paper holding plate and is close to the paper inlet. The paper shredding assembly is disposed below the paper inlet, and the end, away from the curved paper box, of the paper is driven by a paper pick-up assembly to enter the paper shredding assembly through the paper inlet.

A lottery ticket destroying device includes a housing, roller cutters mounted in the housing, a transmission gear set mounted on one side of the housing, a motor mounted on one side of the housing for rotating the transmission gear set to drive the roller cutters to cut lottery tickets into pieces. Each roller cutter has a plurality of helical shear grooves recessed into the roller cutter surface thereof. Each helical shear groove has a groove bottom surface, a vertical shear surface located on one side of the groove bottom surface and connected to the roller cutter surface and a chip-discharge sloping surface located on an opposite side of the groove bottom surface and connected to the roller cutter surface. Moreover, one end of the shaft of one of the roller cutters is combined with an elastic member to prevent the two roller cutters from being stuck.

A coarse crushing device including a rotary cutter portion tearing off a fiber-containing sheet in a first direction, a roller portion pinching the fiber-containing sheet, and a tearing portion provided between the rotary cutter portion and the roller portion, and having a plurality of blades tearing off the fiber-containing sheet in a second direction intersecting the first direction, in which the rotary cutter portion includes a first rotating shaft member rotating about a first axis, a second rotating shaft member rotating reversely to the first rotating shaft member about a second axis parallel to the first axis, a plurality of first rotary cutters provided on the first rotating shaft member and rotating together with the first rotating shaft member, and a plurality of second rotary cutters provided on the second rotating shaft member and rotating together with the second rotating shaft member, and the first rotary cutter and the second rotary cutter are separated from each other.

An automatic paper shredder with a staple removing structure and a staple removing method using the same. The automatic paper shredder includes a shredder cover, a paper holding box, a shell, a paper holding plate, a paper inlet, a paper shredding component, a drive motor, a paper pick-up component, a paper pressing plate, a straight through-hole, a waste paper bin and a staple removing component. The automatic paper shredder removes a staple (or clip) on a stack of paper through cooperation with a paper shredding structure. Paper can be automatically picked up in batches. Meanwhile, damage caused by staples to the whole shredder is prevented, and thus, the whole shredder is protected in use and has a longer service life.

A paper shredder has a paper tray, a paper inlet, a shredder cover, a paper pressing plate, paper pick-up rollers, a shredder cutter shaft, a motor, a wastepaper barrel, and a paper limiter. The paper tray carries a stack of to-be-shredded paper. The paper inlet guides to-be-shredded paper. The shredder cover end is connected to the shredder body by a rotary shaft, closing or opening the shredder body. The paper pressing pl presses the stack in the paper tray. The paper pick-up rollers are on one side of the paper inlet, feeding the paper tray stack into the paper inlet. The shredder cutter shaft shreds the to-be-shredded paper. The motor drives the shredder cutter shaft to operate. The wastepaper barrel is located below the paper inlet to collect shredded paper. The paper limiter is limits one of a thickness or a length of the stack placed in the paper tray.

A flywheel and paddle assembly for a chipping or shredding apparatus, including a wood chipper, a brush chipper, and a leaf shredder. The assembly has a flywheel attached coaxially to a drive shaft. The flywheel has at least one aperture extending from the front side to the back side, and carries at least one knife adjacent to the at least one aperture. The knife presents a knife edge on the front side of the flywheel. A paddle is rotatably mounted coaxially to the drive shaft adjacent to the back side of the flywheel. The paddle is configured to rotate on the drive shaft independently of the flywheel. A chipping or shredding apparatus incorporating the aforesaid flywheel and paddle assembly is also disclosed.