Sheet feed shaft, apparatus for manufacturing same and method for manufacturing same
AssigneeKabushiki Kaisha Tsukada Nezi Seisakusho
InventorsSAKAE TSUKADA, EIJI TSUKADA
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Abstract
A sheet such as paper or hard film can be fed accurately in an intended direction while positively holding the sheet merely by applying plastic processing to a peripheral surface of a metallic rod. 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.
Claims13
A sheet feed shaft in which a plurality of spike-like projections risen at an obtuse angle, at an acute angle or at right angles in a rotational direction of a metallic rod are formed on a circumferential surface of the metallic rod by plastic processing.
A sheet feed shaft in which a plurality of spike-like projections risen at an obtuse angle, at an acute angle or at right angles in a rotational direction of a metallic rod are formed on a circumferential surface of the metallic rod by plastic processing, said projections being provided over a plurality of rows in a circumferential direction of the circumferential surface of the metallic rod.
A sheet feed shaft in which a plurality of spike-like projections risen at an obtuse angle, at an acute angle or at right angles in a rotational direction of a metallic rod are formed on a circumferential surface of the metallic rod by plastic processing, said projections being provided over a plurality of rows in a circumferential direction of the circumferential surface of the metallic rod, the plural rows of projections adjacent to each other being made as one group, the plurality of groups being provided alternately.
An apparatus for manufacturing a sheet feed shaft comprising a support bed for supporting a metallic rod, and a punch unit arranged opposite to the support bed and driven for reciprocation by a press, and a pair of perforating members detachably mounted on said punch unit and having perforating edges formed on faces opposed to each other.
A method for manufacturing a sheet feed shaft comprising:
- supporting a metallic rod on a support bed, and simultaneously applying a perforating process to two portions in which peripheral surfaces of the metallic rod are opposed by perforating members formed with perforating edges on face sides opposed to each other to form a plurality of spike-like projections whose rising directions are opposite to each other.
Dependencies are inferred from the claim text.