Browse Prior Art Database

Sheet Material Transport System

IP.com Disclosure Number: IPCOM000081306D
Original Publication Date: 1974-May-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 3 page(s) / 44K

Publishing Venue

IBM

Related People

McCarty, VD: AUTHOR

Abstract

The present combination provides an improved document transport of the type generally shown in Fig. 1, comprising a first and second pulley 3 and 5, respectively, either one or both of which are driven at a suitable speed in the direction shown by the arrow, by means not shown, and which are connected by a double-sided timing belt 7 of the type well known in the art. These belts are flexible elastic belts having ridges or teeth on both sides thereof. In the present instance, the teeth on the inner side of the timing belt mesh with appropriate grooves in the pulleys 3 and 5, so that the belt moves without slipping in synchronism with the rotation of the pulleys.

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Sheet Material Transport System

The present combination provides an improved document transport of the type generally shown in Fig. 1, comprising a first and second pulley 3 and 5, respectively, either one or both of which are driven at a suitable speed in the direction shown by the arrow, by means not shown, and which are connected by a double-sided timing belt 7 of the type well known in the art. These belts are flexible elastic belts having ridges or teeth on both sides thereof. In the present instance, the teeth on the inner side of the timing belt mesh with appropriate grooves in the pulleys 3 and 5, so that the belt moves without slipping in synchronism with the rotation of the pulleys.

This double-sided timing belt 7 passes over a vacuum chamber or plenum 9, so that the topmost surface of the belt teeth is outside of the vacuum chamber, and the intertooth portion of the outer surface of the belt is in contact with chambers in the vacuum plenum 9. The lower surface of the belt is open to atmosphere in the central portion of the plenum chamber. The purpose behind the arrangement of parts in this manner is to provide a transport system in which the top surface of the documents is not obscured by the conventional belts and the like used in prior transports, but instead one side of the documents transported over the vacuum chamber will be largely or completely clear for the purposes of reading information contained on the document 11 or for other processing thereof.

In instances where the motion of the document 11 must be accurately controlled, particularly, for example, with respect to stopping the document accurately, it is necessary to have very positive control over the positioning of the document on the belt 7, that is to say, there must be little or no slippage between the document 11 and the top of the belt 7. Documents such as the one designated by the reference character 11 would be delivered to the transport at the one end thereof and transported to the opposite end, where...