Browse Prior Art Database

A MULTI-CYCLE XEROGRAPHIC SYSTEM

IP.com Disclosure Number: IPCOM000025180D
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 86K

Publishing Venue

Xerox Disclosure Journal

Abstract

Dual-cycle xerographic copiers in which imaging, development and transfer occurs on the first cycle and cleaning on the second cycle are known. The perceived advantage of such copiers is the dual function of subsystem components with a resultant cost savings over conventional single cycle xerographic systems. How-ever, a major drawback to the dual-cycle system is the obvious requirement that the circumference of the photoreceptor must accommodate the largest paper size for which the copier is designed in order that a complete image occurs on the first cycle. Further, constraints on unit manufacturing cost and copier size has encouraged a trend toward copiers employing short edge paper feed. Combined with a requirement for copying legal size documents (1 1" x 14"), the photoreceptor is constrained to be- 4.7" in diameter in a dual-cycle copier. This is incompatible with the need to minimize the physical size of the copier, especially the height.

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XEROX DISCLOSURE JOURNAL

A MULTI-CYCLE XEROGRAPHIC SYSTEM Proposed Geoffrey M. T. Foley Classification

U.S. C1. 355/3DD Int. Cl. G03g 15/00

Dual-cycle xerographic copiers in which imaging, development and transfer occurs on the first cycle and cleaning on the second cycle are known. The perceived advantage of such copiers is the dual function of subsystem components with a resultant cost savings over conventional single cycle xerographic systems. How- ever, a major drawback to the dual-cycle system is the obvious requirement that the circumference of the photoreceptor must accommodate the largest paper size for which the copier is designed in order that a complete image occurs on the first cycle. Further, constraints on unit manufacturing cost and copier size has encouraged a trend toward copiers employing short edge paper feed. Combined with a requirement for copying legal size documents (1 1" x 14"), the photoreceptor is constrained to be- 4.7" in diameter in a dual-cycle copier. This is incompatible with the need to minimize the physical size of the copier, especially the height.

A solution to the above problem is disclosed and comprises a multi-cycle xerographic system that eliminates the requirement that the photoreceptor cir- cumference be greater than or equal to one pitch as in the dual-cycle system while maintaining all the benefits of a dual-cycle architecture. In the system, cleaning is accomplished by the development roll every n/2 cycles, where n 02) specifies the number of photoreceptor revolutions for each full cycle of the copier. The required p...