Electrophotography – Document handling – Original
Reexamination Certificate
1999-09-13
2001-04-10
Lee, Susan S. Y. (Department: 2852)
Electrophotography
Document handling
Original
C271S003190, C271S186000, C358S474000, C399S370000
Reexamination Certificate
active
06215976
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an automatic document conveyance apparatus used for conveying a document to a reading position for reading the document, and particularly to an automatic document conveyance apparatus by which the document can be conveyed such that obverse and reverse sides of the document are reversed, in order to read images on the obverse and reverse sides of the document. The automatic document conveyance apparatus according to the present invention is used for a copier, a facsimile device, and the like.
Preferred characteristics for the above-described automatic document conveyance apparatus are a small size, efficient reversing and conveying capabilities, and so on. As an automatic document conveyance apparatus to satisfy such requirements, for example, there is an apparatus disclosed in Japanese Tokkaihei No. 7-175279.
The automatic document conveyance apparatus disclosed in Japanese Tokkaihei No. 7-175279 has a reversal conveyance path to reverse both sides of the document, and after the document is conveyed such that its first side is read, the document is conveyed to the reversal conveyance path, and is reversed on the reversal conveyance path, and conveyed again to the reading position. The document whose second side has been read, is further reversed to align the page order at the delivery.
As described above, in the automatic document conveyance apparatus disclosed in the above patent publication, it is required that the document passes through the conveyance path 3 times in total in order to achieve reading of both sides thereof. Accordingly, in the conventional automatic document conveyance apparatus disclosed in the above patent publication, efficiency of the reading operation at the time of reading the both sides is not good, and high speed reading can not be performed, which is a problem.
SUMMARY OF THE INVENTION
Accordingly, in order to enable two-side reading, an object of the present invention is to solve the above-described problem of the conventional technology in the automatic document conveyance apparatus having the reversal conveyance function.
The above-described object of the present invention is attained by an automatic document conveyance apparatus which has: a sheet feeding source on which a large number of documents can be placed and which can feed the document one by one sheet; a reversal path through which the obverse and reverse sides of the document fed from the sheet feeding source is reversed; a reading position forming means for forming the reading position of the document which is fed from the reversal path and conveyed; and a delivery sheet tray on which documents, which pass through the reading position forming means and are delivered, are stacked, wherein the document fed from the sheet feeding source is conveyed onto the reversal path, and after the obverse and reverse sides of the document are reversed, the document is fed to the reading position forming means and the one side of the document is read, and the document whose one side is read is conveyed again onto the reversal path, and after the obverse and reverse sides of the document are reversed again, the document is fed again to the reading position and the other side of the document is read, and the document whose other side is read is delivered from the reading position forming means to the delivery tray.
REFERENCES:
patent: 5669056 (1997-09-01), Rubscha
patent: 5887865 (1999-03-01), Ishimaru
patent: 5926681 (1999-07-01), Ishimaru
patent: 5991592 (1999-11-01), Kobayashi et al.
patent: 6047959 (2000-04-01), Baba et al.
patent: 6081688 (2000-06-01), Okada et al.
patent: 7-175279 (1995-07-01), None
Endo Satoru
Itou Kazuaki
Kato Osamu
Kawano Masanobu
Mizubata Tsuyoshi
Frishauf, Holtz Goodman, Langer & Chick, P.C.
Konica Corporation
Lee Susan S. Y.
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