Paper feeding device having a replaceable paper conveying...

Details Paper feeding device having a replaceable paper conveying... Paper feeding device having a replaceable paper conveying...

2001-01-23

2002-12-03

Walsh, Donald P. (Department: 3651)

Sheet feeding or delivering

Feeding

Separators

C384S435000

Reexamination Certificate

active

06488276

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a paper feeding device having a replaceable paper conveying roller, in particularly, to a replaceable paper conveying roller for paper feeding devices such as a scanner, a printer, a fax machine, or a copier.
2. Brief Description of Related Art
Prior art has used a roller to convey papers in a paper feeding device, as shown in
FIG. 1. A
back shell
16
wraps around two brackets
11
and
12
, which reinforce the shell. The brackets
11
and
12
have two sockets
112
and
122
respectively for mounting a shaft
15
. A roller
16
, made of friction material, is mounted over the shaft
15
. The left end
18
of the shaft
15
feeds through the socket
112
, and the right end
19
of the shaft
15
feeds through the socket
122
. The shaft
15
is indirectly driven by a gear
17
located at the right end of the shaft
15
. When the gear
17
is driven by a motor (not shown), the roller
16
rotates and the friction coveys the paper P forward.
Due to high-speed operation of modern paper feeding devices, the roller
16
experiences wear and tear. The lifetime of the paper feeding device is thus adversely affected.
SUMMARY OF THE INVENTION
An object of this invention is to increase the useful lifetime of a paper feeding device. Another object is to reduce the servicing cost of a paper feeding device.
These objects are achieved by using a replaceable paper conveying roller for a paper feeding device. A paper feeding device of the invention includes a back plate, a first bracket, a second bracket, a shaft, and a friction roller. The first bracket is arranged on the back plate and formed of a first socket. The second bracket is arranged on the back plate and formed of a second socket. The shaft has a first end and a second end opposite to the first end. The first end of the shaft is rotatably mounted in the first socket. The second end of the shaft is rotatably mounted in the second socket. At least one of the first and second sockets is an open-ended socket for facilitating both the insertion and removal of the shaft. The friction roller wraps around the shaft for conveying a piece of paper.


REFERENCES:
patent: 4473321 (1984-09-01), Culver et al.
patent: 5261658 (1993-11-01), Nagai
patent: 5878318 (1999-03-01), Sako et al.
patent: 6024497 (2000-02-01), Leibman
patent: 64-87436 (1993-03-01), None

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