Sheet feeding or delivering – Feeding – Separators
Reexamination Certificate
2003-02-05
2004-08-10
Bollinger, David H (Department: 3653)
Sheet feeding or delivering
Feeding
Separators
C271S264000, C271S314000
Reexamination Certificate
active
06773007
ABSTRACT:
BACKGROUND OF THE INVENTION
(1) Field of the Invention
This invention relates to a printer, particularly to he conveying roller of the printer.
(2) Brief Description of Related Art
Prior art has been using a roller to convey paper in a printer, as shown in
FIG. 1. A
metal back shell
10
wraps around two brackets
11
,
12
, which reinforce the shell. The brackets
11
and
112
each have two sockets
121
and
122
respectively for mounting a shaft
15
. A roller
16
, made of friction material, is mounted over the shaft
15
. The left side
18
of the shaft
15
feeds through the socket
112
, and the right side of the shaft
15
feeds through the socket
122
. The axle is driven by a gear
17
located at the right end of the axle
15
. When the gear
17
is driven by a motor (not shown), the roller
15
rotates and the friction coveys the paper P forward.
Due to high speed operation of modem printers, the roller
16
experiences wear and tear. The life of the printer is thus adversely affected.
SUMMARY OF THE INVENTION
An object of this invention is to increase the useful life of a printer. Another object is to reduce servicing coast of a printer.
These object is achieved by using a replaceable roller for a printer. A replaceable friction roller is mounted on the driving shaft of a paper conveying roller. The roller is made replaceable by providing a slit from the surface of the roller to the shaft surface. The roller can be split open along the cut when replacing a new roller. The ends of the shaft of the roller are inserted in at least one open mouth socket. The socket has spring action to hold the shaft in place.
REFERENCES:
patent: 4473221 (1984-09-01), Arai
patent: 4729557 (1988-03-01), Kiyohara
patent: 5421569 (1995-06-01), Davidson
patent: 6488276 (2002-12-01), Sheng et al.
patent: 2132737 (1984-07-01), None
patent: 61203037 (1986-08-01), None
patent: 43753 (1992-08-01), None
Lien Szu-Hui
Sheng Thomas
Avision Inc.
Bollinger David H
Lin Patent Agent H. C.
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