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A DOCUMENT HANDLING SYSTEM

IP.com Disclosure Number: IPCOM000027184D
Original Publication Date: 1995-Aug-31
Included in the Prior Art Database: 2004-Apr-07
Document File: 4 page(s) / 158K

Publishing Venue

Xerox Disclosure Journal

Abstract

A document handling system for maintaining uniform unbound margins on trimmed signatures in a light lens electrophotographic machine is disclosed. As it is well known, a signature-type document is a sheet typically containing four numbered pages which when folded and nested inside one another become one unit of a pamphlet or book. A result of fitting several folded pages of finite thickness to make a pamphlet or book together, the inside pages of the pamphlet or book protrude beyond the perimeter of the outside page. This shingling effect can be eliminated by a secondary trimming operation either on-line or off line by trimming. The finished pamphlet or book now has acceptable uniform edges but the images on each side of the page appear to be going toward the center of the pamphlet or book, which is unacceptable. The document handling system of the present disclosure has the capability of correcting this defect by shifting the images of each succeeding sheet toward the center-fold when going from the outside to the inside pages of the book, thus keeping the unbound margins uniform.

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 54% of the total text.

Page 1 of 4

XEROX DISCLOSURE JOURNAL

A DOCUMENT HANDLING SYSTEM Thomas Acquaviva

Proposed Classification

US. C1.355/322 Int. C1. G03g 15/00

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XEROX DISCLOSURE JOURNAL - VOI. 20, NO. 4 July/August 1995 349

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Page 2 of 4

A DOCUMENT HANDLING SYSTEM (Cont'd)

A document handling system for maintaining uniform unbound margins on trimmed signatures in a light lens electrophotographic machine is disclosed. As it is well known, a signature-type document is a sheet typically containing four numbered pages which when folded and nested inside one another become one unit of a pamphlet or book. A result of fitting several folded pages of finite thickness to make a pamphlet or book together, the inside pages of the pamphlet or book protrude beyond the perimeter of the outside page. This shingling effect can be eliminated by a secondary trimming operation either on-line or off line by trimming. The finished pamphlet or book now has acceptable uniform edges but the images on each side of the page appear to be going toward the center of the pamphlet or book, which is unacceptable. The document handling system of the present disclosure has the capability of correcting this defect by shifting the images of each succeeding sheet toward the center-fold when going from the outside to the inside pages of the book, thus keeping the unbound margins uniform.

The document handling system operates as follows: An operator loads the first document against the preregistration gate 30 at the conventional input, here the semi-automatic document handler (SADH) input loading tray 22, as in FIG. 1. Upon the command of the controller and interdocument processor, controlled by the input sensors, the gate 30 is raised and this first document sheet advances towards, but not completely onto, the platen 23, as shown in FIG. 2. Under the control of the appropriate illustrated paper path sensors and the servo motor drive, the trail edge of the first original stop just beyond the gate 30, as shown in FIG. 3. The gate 30 is dropped back into the document path and the document is backed up by a few millimeters until its trail edge reaches the back side of the gate 30, as illustrated in FIG. 3. The operator or the automatic document feeder, whichever is being utilized,. now feeds the second original sheet, as shown in FIG. 4. The interdocument control processor starts the SADH sevro motor subject to a variable delay so that the first sh...