Overhanging paper guide for a scanner

Details Overhanging paper guide for a scanner Overhanging paper guide for a scanner

2001-02-09

2003-11-11

Bollinger, David H. (Department: 3653)

Sheet feeding or delivering

Feeding

By means to convey sheet

Reexamination Certificate

active

06644658

ABSTRACT:

BACKGROUND OF THE INVENTION
(1) Field of the Invention
This invention relates to scanners, particularly to the paper guide of a scanner.
(2) Brief Description of the Related Art
FIG. 1
shows a prior art paper guide for a scanner. The paper guide is mounted over the scan window
24
of on top of the scanner frame
20
. The paper guide has an upper guide
10
, a lower paper inlet guide
11
, a lower paper outlet guide
12
, and a transparent film
23
between the inlet guide
11
and the outlet guide
12
, as shown in FIG.
2
. One end of the transparent film
23
connects to the lower surface of the outlet end
112
of the inlet guide
11
, while the other end of the transparent film
23
connects to the upper surface of the inlet end
121
of the outlet guide
12
. When a document P is fed from the lower paper inlet guide
11
past the transparent film
23
, a light beam from the light source L is reflected by the paper as a beam
21
to sensitize an image sensor
22
for further signal processing. It can be seen that the lower guide includes three parts, the inlet paper lower guide
11
, the transparent film
23
, and the outlet paper lower guide
12
. The transparent film
23
adds to the cost of a scanner, and is subject to rubbing during use, which may blur the film in time to obstruct the incident light.
SUMMARY OF THE INVENTION
An object of this invention is to reduce the cost of the paper guide of a scanner. Another object is to prevent the blurring of the transparent film of a scanner. Still another object is to optimize the amount of light incident on the document being scanned.
These objects are achieved by eliminating the transparent film. The inlet lower guide overhangs over the outlet lower guide. When the document is transported past the gap between the two lower guides, the document is read.


REFERENCES:
patent: 5881350 (1999-03-01), Wada et al.
patent: 6178274 (2001-01-01), Youda et al.
patent: 6219511 (2001-04-01), Okada
patent: 354209 (1996-12-01), None

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