Browse Prior Art Database

NEXT GENERATION PAPER FEEDER

IP.com Disclosure Number: IPCOM000027841D
Original Publication Date: 2000-Feb-29
Included in the Prior Art Database: 2004-Apr-09
Document File: 8 page(s) / 413K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is an improved paper feeder that includes a large footprint suction chamber to corrugate the top sheet of a stack by drawing it partially into the suction chamber. A post Xerox Disclosure Journal - Vol. 25, No. 1 JanuaryFebruary 2000 47

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 23% of the total text.

Page 1 of 8

XEROX DISCLOSURE JOURNAL

NEXT GENERATION PAPER FEEDER

Proposed Classification Denis J. Stemmle U. S. C1. 399/383

Int. C1. G03g 15/00

r#;

32

24

3 ,* 36

2

- 34

Xerox Disclosure Journal - Vol. 25, No. 1 JanuaryFebruary 2000 45

38

I

I

I A3 long Edge Feed I

I

I

- 76

\ I 16

I t-'

A3 Short Edge Feed

I

L

I

2 48 l,--------J

FIG. 7

[This page contains 1 picture or other non-text object]

Page 2 of 8

NEXT GENERATION PAPER FEEDER (Cont'd)

78

/

46 Xerox Disclosure Journal - Vol. 25, No. 1 JanuaryFebruary 2000

[This page contains 1 picture or other non-text object]

Page 3 of 8

NEXT GENERATION PAPER FEEDER (Cont'd)

8

Disclosed is an improved paper feeder that includes a large footprint suction chamber to corrugate the top sheet of a stack by drawing it partially into the suction chamber. A post

Xerox Disclosure Journal - Vol. 25, No. 1 JanuaryFebruary 2000 47

[This page contains 1 picture or other non-text object]

Page 4 of 8

NEXT GENERATION PAPER FEEDER (Cont'd)

in front of the stack includes an air nozzle to blow air below the sheet as it is drawn into a corrugated shape. As the sheet is corrugated, the edges of the sheet move slightly in a direction perpendicular to the direction of sheet feed. This motion breaks the sheet-to- sheet bonds, including edge welds, fiber interlock, and vacuum locks, thereby reducing the potential for multifeeds. The post with the air nozzle has an elevation higher than the surface of the stack. The corrugated sheet moves over the top of the post. The second, non-corrugated sheet is held back by the post.

There are three types of paper feeders used in reprographic equipment today. The buckle feeders used in low cost equipment have the advantage of low cost, but work well only at low capacities, and for a limited range of papers. The friction retard feeders used in mid- volume equipment cost more, but extend the capacity and range of papers that can be fed when compared to buckle feeders. Higher volume equipment uses vacuum cormgating feeders (VCF) that have both the highest cost and best performance. But even vacuum corrugating feeders do not have the latitude and performance required by a next generation of reprographic products being planned.

Feeder technologies developed to feed a limited range of papers have been developed for use in electrophotographic equipment. At least one class of these products is targeted towards the offset industry, which requires a much wider range of media such as offset papers, coated stock, and recycled papers. These papers have a much looser specification than electrophotographic papers. For example, the sheet to sheet size variation within reams are much greater than for electrophotographic papers, and the condition of the edges of the sheets is not specifically controlled. This means a higher incidence of "edge welds" in offset papers. Edge welds are caused when the sheets are cut to size at the mill, and the cutting action causes the edge of one sheet to fold slightly over the s...