Abstract: Provided is an ergonomic cutting device for cutting casts and other rigid objects comprising an oscillating cutting blade driven by a motor, a handle, and a vacuum system. The present cutting device is designed such that the offset positioning of the motor enables the weight of the motor to help manipulate and make more efficient the device. The vacuum system cools the device and draws dust produced by the cutting blade through the device without contacting the dust with the motor or other mechanical components. The motor is designed to initially engage in an idle mode when the device is turned on, then automatically sense when a load is placed on the cutting blade and, at that point, boost to a cutting mode. The motor may also be manually placed in a higher powered turbo mode. The device also includes a dynamic braking system which enables the device to stop oscillation of the blade faster than previous device.

Abstract: Methods and apparatus for stacking predetermined sheets of various intermixed sizes in a stacking location by advancement of stacking devices into that location, selectively guide further sheets past the stacking location. That guiding of further sheets past the stacking location is mechanically slaved to the advancement of the stacking devices into the stacking location. Where the stacking devices are withdrawn from the stacking location preparatory to each stacking of a predetermined sheet, the guiding of that predetermined sheet into the stacking location is mechanically slaved to such withdrawal of the stacking devices. Where the sheets are stacked against a movable wall, an unobstructed space for receiving each sheet guided to the stacking location is permanently preserved between the movable wall and the withdrawn stacking devices.

Abstract: Sheet feeding systems provide a sheet receiving nip at a peripheral region of a rotary sheet transport and arrange sheets in a stack having a stack and formed by a bottom sheet and spaced from the nip by a distance shorter than the minimum length of any of the sheets. The stack is temporarily lifted from a stack rest, and the bottom sheet is removed therefrom. Sheet jams are prevented by advancing any bottom sheet to the rotary sheet transport in a plane intersecting that rotary sheet transport at a distance from the nip. Each bottom sheet is further advanced from that intersecting plane to the nip, and such advanced bottom sheet is engaged with the nip for transport away from the stack with the rotary sheet transport. The stack end is returned to the stack rest after said removal of a bottom sheet, and the temporary stack end lifting, sheet advancing, sheet engaging and stack end returning steps are repeated individually for further bottom sheets advanced from the stack end.