# US 10,766,726 B2 · Sheet conveying device for conveying sheets such as documents, recording paper, and the like

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- Number: US 10,766,726 B2
- Document ID: US10766726B2
- Status: Granted
- Kind: B2
- Application number: 16/232,550
- Filed: 2018-12-26
- Published: 2019-07-25
- Granted: 2020-09-08
- Earliest claimed: 2018-01-24
- Assignees: KYOCERA Document Solutions Inc.
- Applicants: KYOCERA Document Solutions Inc.
- Inventors: Kaori Kitayama
- Web page: https://patentgrep.com/patent/US10766726B2

## CPC

- B65H 7/125: {sensing the double feed or separation without contacting the articles}
- B65H 3/06: Rollers or like rotary separators {(B65H3/42 takes precedence)}
- B65H 5/062: {between rollers or balls}
- B65H 2511/22: Distance
- B65H 2511/524: Multiple articles, e.g. double feed
- B65H 2513/512: Starting; Stopping
- B65H 2701/1311: leading edge
- B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES

## Abstract

Provided is a sheet conveying device capable of suppressing the recurrence of overlapped feeding in accordance with the detection of overlapped feeding. The sheet conveying device includes a paper-supply roller and a conveying roller. A sheet-detecting unit detects a leading edge position of a sheet. An overlapped-feeding-detecting unit detects overlapped-feeding of sheets. An overlapped-feeding-distance-calculating unit, based on detection results, calculates an overlapped-feeding distance in which sheets are overlapped. A conveyance-control unit causes the paper-supply roller to stop at a timing when a position separated a set length in a sheet-conveyance direction from a sheet trailing edge reaches the paper-supply roller. The conveyance-control unit, in a case where detection of overlapped feeding by the overlapped-feeding-detecting unit occurs a plurality of times, extends the set length based on the overlapped-feeding distance.

## Claims

### Claim 1

A sheet conveying device comprising a paper-supply roller for feeding sheets one by one from a paper-supply unit to a paper-conveyance path, and a conveying-roller for conveying the sheets fed to the paper-conveyance path by the paper-supply roller; and further comprising:
a sheet-detecting unit for detecting a leading edge position of a sheet;
an overlapped-feeding-detecting unit for detecting overlapped feeding of the sheets;
an overlapped-feeding-distance-calculating unit that, based on the detection results of the sheet-detecting unit and the overlapped-feeding-detecting unit, calculates an overlapped-feeding distance in which the sheets are overlapped; and
a conveyance-control unit that causes the paper-supply roller to stop at a timing when a part of the sheet reaches the paper-supply roller; wherein,
the paper-supply roller feeds the sheets in a sheet-conveyance direction from the paper-supply unit to the paper-conveyance path;
the part of the sheet is defined as a position on the sheet that is separated a set length, in the sheet-conveyance direction, from a trailing edge of the sheet; and
the conveyance-control unit, in a case where detection of overlapped feeding by the overlapped-feeding-detecting unit occurs a plurality of times, extends the set length based on the overlapped-feeding distance.

### Claim 2 (depends on 1)

The sheet conveying device according to claim 1 wherein the conveyance-control unit:
obtains an initial value;
determines an adjustment value based on the overlapped-feeding distance, wherein there is a positive correlation between the adjustment value and the overlapped-feeding distance; and
determines the set length by adding the adjustment value to the initial value.

### Claim 3 (depends on 2)

The sheet conveying device according to claim 2 wherein the conveyance-control unit:
determines the adjustment value by multiplying the overlapped-feeding distance by a coefficient; or
determines the adjustment value based on the overlapped-feeding distance in stages such that the adjustment value is larger as the overlapped-feeding distance becomes larger.

### Claim 4

A sheet conveying device comprising a paper-supply roller for feeding sheets one by one from a paper-supply unit to a paper-conveyance path, and a conveying-roller for conveying the sheets fed to the paper-conveyance path by the paper-supply roller; and further comprising:
a sheet-detecting unit for detecting a leading edge position of a sheet;
an overlapped-feeding-detecting unit for detecting overlapped feeding of the sheets;
an overlapped-feeding-distance-calculating unit that, based on the detection results of the sheet-detecting unit and the overlapped-feeding-detecting unit, calculates an overlapped-feeding distance in which the sheets are overlapped; and
a conveyance-control unit that causes the paper-supply roller to stop at a timing when a part of the sheet reaches the paper-supply roller; wherein,
the paper-supply roller feeds the sheets in a sheet-conveyance direction from the paper-supply unit to the paper-conveyance path;
the part of the sheet is defined as a position on the sheet that is separated a set length, in the sheet-conveyance direction, from a trailing edge of the sheet; and
the conveyance-control unit, in a case where detection of overlapped feeding by the overlapped-feeding-detecting unit occurs a plurality of times, changes the set length to the overlapped-feeding distance.