Electrophotography – Image formation – Development
Patent
1998-07-16
1999-06-15
Pendegrass, Joan
Electrophotography
Image formation
Development
399249, G03G 1510
Patent
active
059130962
ABSTRACT:
An alignment device for a developing roller and a squeegee roller of an image forming apparatus. The alignment device includes a first supporting block for supporting the shaft of a first backup roller which in turn is disposed opposite to the squeegee roller with a photosensitive belt therebetween; and a second supporting block for fixing the shaft of a developing roller and enabling development by the developing roller, and for supporting the shaft of a second backup roller which in turn is disposed opposite to the developing roller with the photosensitive belt therebetween. A roller frame is provided for fixing the shaft of the squeegee roller, and for supporting the first supporting block and the second supporting block while surrounding a portion of the second supporting block. An elastic member is installed between the first and second supporting blocks for adjusting the centers of the supporting blocks. In the above image forming apparatus, since the developing roller and a corresponding backup roller are supported by an integral, one-piece supporting block, the assembly tolerance present in a conventional block is avoided. When shafts of backup rollers are seated at grooves of the respective supporting blocks, an error in the horizontal position is compensated for by an elastic force of an elastic member installed between the supporting blocks, and the supporting blocks are precisely centered. Accordingly, there is an advantage in that a developing roller and a squeegee roller can be precisely aligned with the respective backup rollers.
REFERENCES:
patent: 3368526 (1968-02-01), Matsumoto et al.
patent: 3830199 (1974-08-01), Saito et al.
patent: 4127082 (1978-11-01), Kawabata
patent: 5604570 (1997-02-01), Jeran et al.
patent: 5713068 (1998-01-01), Teschendorf et al.
Chen Sophia S.
Pendegrass Joan
Samsung Electronics Co,. Ltd.
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