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Roller Exerciser for a Feed Roller Assembly

IP.com Disclosure Number: IPCOM000039780D
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Davis, MA: AUTHOR [+2]

Abstract

A rubber feed roller, which is automatically mounted on a plastic bushing, is exercised after being mounted on the bushing so that it will move parallel to the longitudinal axis of the bushing to reduce the gap between one end of the roller and a shoulder of the bushing to less than the maximum tolerance. When automatically mounting a short rubber feed roller on a plastic bushing which is then automatically mounted on a shaft to form a feed roll shaft assembly, the end of the feed roller is not always positioned from a shoulder of the bushing within the maximum tolerance of 0.040". This is because the inner diameter of the feed roller changes due to temperature and humidity, the coefficient of friction of rubber, and the coefficient of friction of plastic.

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Roller Exerciser for a Feed Roller Assembly

A rubber feed roller, which is automatically mounted on a plastic bushing, is exercised after being mounted on the bushing so that it will move parallel to the longitudinal axis of the bushing to reduce the gap between one end of the roller and a shoulder of the bushing to less than the maximum tolerance. When automatically mounting a short rubber feed roller on a plastic bushing which is then automatically mounted on a shaft to form a feed roll shaft assembly, the end of the feed roller is not always positioned from a shoulder of the bushing within the maximum tolerance of 0.040". This is because the inner diameter of the feed roller changes due to temperature and humidity, the coefficient of friction of rubber, and the coefficient of friction of plastic. As a result, the rubber feed roller has to be manually modified to change its shape so that both ends are within
0.040" of a shoulder of the bushing.

(Image Omitted)

Feed roller assemblies 1 (Fig. 2), which comprise a rubber feed roller 2 and a bushing 3, are supplied from a vibratory hopper and feeder bowl 4 (Fig. 4) to three tubes 5. The feed roller assemblies 1 are supplied through each of the three tubes 5 to an inverter station 6. At each of the inverter stations 6, one of the feed roller assemblies 1 has a shaft positioned within the bushing 3 (Fig. 3). Each of the tubes 5 (Fig. 4) has a first sensor 7 at its bottom to sense when one of the feed roller assemblies 1 is at the inverter station 6. Each of the tubes 5 has a second sensor 8 adjacent a pair of back-up rollers 9 of a roller exerciser 10 to sense w...