Sheet feeding or delivering – Delivering to stack and feeding therefrom
Reexamination Certificate
1999-01-26
2001-03-20
Bollinger, David H. (Department: 3651)
Sheet feeding or delivering
Delivering to stack and feeding therefrom
C271S004010, C271S010010, C271S265010, C271S258010
Reexamination Certificate
active
06203003
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an original carrying apparatus which scans an original being moved.
2. Related Background Art
Conventionally, a method of moving an original in a state that a reader unit (i.e., exposure lamp) is kept still, thereby reading (or exposure scanning) the original has been known. This method is referred to as running reading. In this case a general analog copy machine performs the exposure scanning on the original by moving the exposure lamp from left to right when the original has been put on a platen glass. In a case where the running reading is performed by the analog copy machine, the original is moved from right to left such that a copy image does not become a mirror image (or reflected image).
FIG. 46
shows a structure to perform the running reading in the conventional analog copy machine.
When the running reading is performed, the exposure lamp is kept still at a position shown in
FIG. 46
, and the original is moved by a belt B
1
to be exposed. In this case, a distance between an antecedent original Dn−1 and a subsequent original Dn is controlled to be L
1
when these originals are being held by the belt B
1
. In the running reading, driving of the belt B
1
is stopped every time original exposure for one paper sheet terminates, and
FIG. 46
shows such a state. The distance L
1
is the sum of distances L
6
and L
5
. The distance L
6
is the distance which is necessary to perform an operation until rotational speed of the belt B
1
is reduced to zero after a trailing edge of the original Dn−1 passes through the exposure lamp, and the distance L
5
is the distance which is necessary to perform an operation to accelerate the rotational speed of the stopped belt B
1
so as to reach a stable running reading speed.
The distance between the originals Dn−1 and Dn both held by the belt B
1
must be established before the original Dn is held by the belt B
1
. In the conventional analog copy machine, before the once-stopped belt B
1
again starts, a next original Dn+1 is carried such that the original Dn+1 reaches a position separated from the original Dn by the distance L
1
. When the running reading of the document Dn starts, rollers R
1
and R
2
start rotating in synchronism with the belt B
1
, and the document Dn+1 is carried to the belt B
1
as the distance L
1
between the documents Dn and Dn+1 is maintained.
At a time when the document Dn+1 is at the position shown in
FIG. 46
, a pair of separation rollers R
4
is arranged to be apart from the document Dn+1 by a distance L
2
such that the document Dn+1 does not get in contact with the rollers R
4
, because of the following reason. That is, since one of the rollers R
4
is rotated in a direction opposite to an original carrying direction, carrying speed of the original is unstable while the rollers R
4
hold the original. Thus, when the rollers R
1
and R
2
and the belt B
1
synchronously start moving, if the rollers R
4
are still holding the document Dn+1, the distance L
1
between the documents Dn and Dn+1 can not be maintained.
As described above, in the conventional analog copy machine, the distance (distance L
1
+length of one sheet of original+distance L
2
) is necessary as the distance from a trailing edge of the document Dn to the rollers R
4
, whereby a long original carrying path has been necessary. For this reason, it has been an obstacle to the downsizing of the copy machine.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an original carrying apparatus which has solved the above-described problem.
Another object of the present invention is to downsize an original carrying apparatus which scans an original while the original is being moved.
Other objects of the present invention will become apparent from the following detailed description and the accompanying drawings.
REFERENCES:
patent: 4579327 (1986-04-01), Furuichi
patent: 5347352 (1994-09-01), Morigami et al.
patent: 5535012 (1996-07-01), Matsumoto et al.
patent: 5580045 (1996-12-01), Matsumoto et al.
patent: 5656187 (1997-08-01), Miyamoto et al.
patent: 5842079 (1998-11-01), Miyamoto et al.
patent: 6076821 (2000-06-01), Embry et al.
Fujii Takayuki
Fukazu Yasuo
Matsumoto Yuzoh
Sato Chikara
Yamazaki Katsuya
Bollinger David H.
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
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