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Strip Assisting Friction Drive Rollers

IP.com Disclosure Number: IPCOM000080613D
Original Publication Date: 1974-Jan-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Matuck, GC: AUTHOR [+2]

Abstract

Fig. 1 illustrates an improved ribbon feeding roller design in which drive rollers 1 and 2 are pressed into engagement, as shown in Fig. 2, to drive a ribbon in the direction of the arrow shown in Fig. 1. A problem occurs with resilient rubber drive rollers such as 1 and 2, in that the ribbon tends to adhere to either roller as it emerges from the nip area between them. Stripping fingers 3 and 4 can be utilized, as shown in Fig. 1, to intercept any ribbon adhering to either roller and deflect it away from the roller.

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Strip Assisting Friction Drive Rollers

Fig. 1 illustrates an improved ribbon feeding roller design in which drive rollers 1 and 2 are pressed into engagement, as shown in Fig. 2, to drive a ribbon in the direction of the arrow shown in Fig. 1. A problem occurs with resilient rubber drive rollers such as 1 and 2, in that the ribbon tends to adhere to either roller as it emerges from the nip area between them. Stripping fingers 3 and 4 can be utilized, as shown in Fig. 1, to intercept any ribbon adhering to either roller and deflect it away from the roller.

An improvement in the function of the stripping fingers is achieved by undercutting rollers 1 and 2 to provide flanges 5 at either end thereof, as shown in Figs 1 and 2. An advantage provided by the undercut area of the rollers is that when the rollers are compressed to drive the ribbon, the full surface of the rollers drives the ribbons since flanges 5 compress. However, as the ribbon emerges from between the rollers 2, the undercut portions of the rollers are the first to lose contact with the ribbon, which is still gripped between the slightly compressed portion of flanges 5 at either edge.

The action produced is that the ribbon is lifted off the undercut area by being gripped by the flange areas for a short distance beyond the central nip area between the rollers, and this allows an increased space for the insertion of stripping fingers 3 and 4. Additionally, the column strength of the ribbon, for purposes o...