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US 6,540,218 B2Granted
Sheet feed shaft, apparatus for manufacturing same and method for manufacturing same
AssigneeKabushiki Kaisha Tsukada Nezi Seisakusho
InventorsSakae Tsukada, Eiji Tsukada
Life of this patent
Estimating the term…
Abstract
A plurality of spike-like projections A, B risen at an obtuse angle, at an acute angle or at right angles in a rotational direction of a metallic rod 1 are formed on an inner peripheral surface of the metallic rod 1 by plastic processing.
Claims18
A sheet feed arrangement for feeding a sheet, the arrangement comprising:
- rotatable metallic rod with a circumferential surface;
- a plurality of projections angularly extending from said circumferential surface of said metallic rod, said plurality of projections being disposed in a plurality of circumferential rows on said surface of said rod, said projections being divided into a plurality of pairs of said projections, each said projection of each said pair being arranged diametrically opposite each other on said rod, said each projection of said pair being directed in opposite circumferential directions, said plurality of projections having a spike shape with an end point, said spike having a shape and said end point being sharply pointed in a rotational direction of said rod to bite into the sheet during rotation of said rod and causing feeding of the sheet.
A sheet feed arrangement for feeding a sheet, the arrangement comprising:
- a sheet feed shaft having a feed surface contactable with the sheet;
- a plurality of projections radially extending from said feed surface of said sheet feed shaft, said plurality of projections being disposed in a plurality of circumferential rows on said surface of said rod, said projections being divided into a plurality of pairs of said projections, each said projection of each said pair being arranged diametrically opposite each other on said rod, said each projection of said pair being directed in opposite circumferential directions, said plurality of projections having a spike shape with an end point, said spike having a shape and said end point being sharply pointed to catch the sheet by spiking and to bite into the sheet causing feeding of the sheet with said feed roller.
Dependencies are inferred from the claim text.