Method of forming a roller and mold for forming the same

Details Method of forming a roller and mold for forming the same Method of forming a roller and mold for forming the same

1998-06-04

1999-04-13

Burr, Edgar

Metal working

Method of mechanical manufacture

Roller making

2989521, 492 47, 492 54, 264274, 264275, 400662, B29C 4514

Patent

active

058932100

ABSTRACT:
A roller for an image forming apparatus comprises: a core body having a shaft positioned in the center thereof, the core body being formed by solidifying a fluid around an outer circumference of the shaft; and a surface layer formed on a surface of said core body, the surface layer being made of hard rubber and having a uniform thickness over the surface of the core body. A mold for the roller, comprises: an inner surface whose section is the same as a section of the core body; a pair of half-split bodies, one end wall of each half-split body having a recess for clamping the shaft, other end wall of each half-split body having a injecting hole for injecting a core body forming fluid therefrom; and a stopper body serving as an aligning member having a through hole in the middle thereof for inserting the shaft thereinto, the stopper body further projecting a stopper on an outer circumference thereof for fitting the stopper into the injecting hole.

REFERENCES:
patent: 1569393 (1926-01-01), Rathers
patent: 2329796 (1943-09-01), Stoffer
patent: 4125931 (1978-11-01), Pierson, Sr. et al.
patent: 4186162 (1980-01-01), Daley
patent: 4235832 (1980-11-01), Leighton
patent: 4583272 (1986-04-01), Keller
patent: 4627755 (1986-12-01), Moriyama et al.
patent: 5089201 (1992-02-01), Takahashi
Abstracts of Japan vol. 11 No. 34 (M-558), Jan. 1987 and JP-A-61 202 865.
Patent Abstracts of Japan vol. 12 No. 227 (M-713) Jun. 28, 1988 and JP-A-63 025013.

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