Masson Scott Thrissell Engineering Limited

Bernard Albert Graves

Graham A Byrt

John Edward Mockett

A platform, for use in a sheet stacking device in which the platform descends as a stack being formed on it grows higher, is so constructed that its length can be varied according to the length of sheets to be stacked. The platform is made in two or more sections (10, 11, 12) each hinged (15, 17) to the next, and all sections are supported horizontally to receive long sheets, less than all the sections being horizontal and the remaining sections hanging vertically when shorter sheets are being stacked. Wheels (13, 16, 18) may be provided on the platform so that it may easily be moved out of the stacking device when loaded, all the sections being restored to a horizontal position for such movement.

Stacking devices and platforms therefor

A stack of sheets is formed in a paper cutter by feeding spaced sheets from a first conveyor to a second and slower conveyor to overlap the sheets which are then fed onto a pallet, the latter being lowered as more sheets are fed. When a stack is near completion the first and second conveyors are decelerated and some sheets diverted from the first conveyor to form a gap in the flow of sheets, the second conveyor only is then accelerated for a period of time to enlarge the gap and then decelerate, both conveyors then being accelerated to normal speed. An auxiliary support is then moved into the path of the sheets falling on to the pallet in the gap previously created. While the completed stack is being removed a new stack is forming on the auxiliary support. The full pallet is replaced by an empty one and the auxiliary support is withdrawn to permit the new stack to drop onto the pallet. The gap may be created without diverting any sheets from the first conveyor and the stack may be changed without the use of the auxiliary support.

Growing community of inventors

Deptford, United Kingdom

Bernard Albert Graves