Drum driving unit of electrophotography printer

Details Drum driving unit of electrophotography printer Drum driving unit of electrophotography printer

1990-05-10

1992-07-21

Moses, R. L.

Photocopying

Contact printing

Light boxes

29122, 355211, 403355, G03G 1500

Patent

active

051327287

ABSTRACT:
An electrophotography printer includes a drum formed of a non-magnetic cylindrical body having an outer circumferential surface to which a photosensitive material is applied, end brackets attached to opposite ends of the drum, and a drum shaft for transmitting a driving torque to the drum. A connection structure between the drum and the drum shaft includes end bracket shafts provided on the end brackets, a hole formed in the drum shaft so as to be capable of engaging with one of the end bracket shafts, parallel pins provided on the end bracket shafts so as to be perpendicular to the axes thereof, and at least one taper groove formed in an end portion of the drum shaft. When the drum is housed, one of the parallel pins and the taper groove engage with each other while the whole of the drum is pressed toward the drum shaft by an elastic member, thereby reducing the non-uniformity of the rotation of the drum.

REFERENCES:
patent: 2300514 (1942-11-01), Lewis
patent: 4425036 (1984-01-01), Kameyama et al.

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