Browse Prior Art Database

BELT TENSIONING AND DRIVE SYSTEM

IP.com Disclosure Number: IPCOM000023868D
Original Publication Date: 1979-Feb-28
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 264K

Publishing Venue

Xerox Disclosure Journal

Abstract

This is a technique to maintain tension across a belt 1 while the belt is in motion, automatically, regardless of the belt-sdirection of travel, The tensioning principle is generally based upon a crowned pulley, but in this case, the pulley is split, the crown reversed, and the two halves 2, 3 positioned at the belt edges instead of in the middle of a belt as with a conventional crowned pulley system. The pulleys 2, 3

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 81% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

BELT TENSIONING AND DRIVE SYSTEM ProposedEdward M. VanWagner Classification

U.S. Cl. 355/50 mt. Cl. G03b 27/48

This is a technique to maintain tension across a belt 1 while the belt is in motion, automatically, regardless of the belt~sdirection of travel, The tensioning principle is generally based upon a crowned pulley, but in this case, the pulley is split, the crown reversed, and the two halves 2, 3 positioned at the belt edges instead of in the middle of a belt as with a conventional crowned pulley system. The pulleys 2, 3

are metal friction drive rollers for driving the belt, against which the belt is held by opposing compressed compression rollers 4, 5 of rubber or the like. With this system the roller axes do not have to be skewed (toed out) relative to the belt path or pivoted for steering the belt, yet the tensioning action is outward at all times.

A further refinement, shown in Figure 2, is to machine discrete inclined steps 6, 7 to provide a lateral force balance at the crowns. The pull of one side equals the other side, and the belt is tensioned without walking towards one side. The lateral force is adjustable by changing the height (diameter) of the steps 6, 7, i.e., the difference between the smaller and larger diameter cylindrical areas on opposite

sides of the steps.

FIG. /

6 FIG.2 7

Volume 4 Number 1 January/February 1979 113

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

Page 2 of 2

BELT TENSIONING AND DRIVE SYS...