Browse Prior Art Database

SPRING LOADED CHAIN IDLER

IP.com Disclosure Number: IPCOM000025379D
Original Publication Date: 1985-Feb-28
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 62K

Publishing Venue

Xerox Disclosure Journal

Abstract

In many automatic office machines including automatic reproducing apparatus such as copiers, the individual components may be driven from a single motor by means of a chain or belt drive. In order to provide synchronized drive, the chain or belt must be precisely fit or have a portion of its run tensioned in some manner. The figure illustrates a single piece molded plastic member that may be used as such a chain tensioning member for a chain drive. In the figure, motor 10 drives chain 12 around an endless path to impart driving engagement to gears 14, 16, and 18 which individually drive a separate component such as a developer dispenser or fuser roll in an electrostatographic reproducing apparatus. The run of the chain is tensioned by means of single piece plastic chain tensioning member 20 which has a mounting slot 22 to mount the tensioning member directly to the machine frame. The plastic chain tensioning member has a round outside diameter section 24 attached by means of spring arm 26 to the mounting portion of the element. A finger hole 28 enables one to manually pull down the chain tensioning member to assemble the chain in its correct position as illustrated in the figure. The single plastic molded part replaces devices that otherwise would include sprockets, studs, shafts, housings, pulleys and springs that are typically used in this type of mechanism.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

SPRING LOADED CHAIN IDLER Carl W. Holland

13 Volume 10 Number 1 January/February. 1985

Proposed Classification
U.S. CI. 267/69

Int. C1. F16f 1/00

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

Page 2 of 2

SPRING LOADED CHAIN IDLER (Cont'd)

In many automatic office machines including automatic reproducing apparatus such as copiers, the individual components may be driven from a single motor by means of a chain or belt drive. In order to provide synchronized drive, the chain or belt must be precisely fit or have a portion of its run tensioned in some manner. The figure illustrates a single piece molded plastic member that may be used as such a chain tensioning member for a chain drive. In the figure, motor 10 drives chain 12 around an endless path to impart driving engagement to gears 14, 16, and 18 which individually drive a separate component such as a developer dispenser or fuser roll in an electrostatographic reproducing apparatus. The run of the chain is tensioned by means of single piece plastic chain tensioning member 20 which has a mounting slot 22 to mount the tensioning member directly to the machine frame. The plastic chain tensioning member has a round outside diameter section 24 attached by means of spring arm 26 to the mounting portion of the element. A finger hole 28 enables one to manually pull down the chain tensioning member to assemble the chain in its correct position as illustrated in the figure. The single pla...