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Temperature Compensation for Ink Rolls

IP.com Disclosure Number: IPCOM000079714D
Original Publication Date: 1973-Aug-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Vichich, FL: AUTHOR

Abstract

In order to provide more uniform inking of type characters on a rotating print disc 10 from an ink roll 12 across the full temperature range of 50 degrees-130 degrees F, a bimetallic leaf spring 14 is utilized. The leaf spring is attached to a mounting arm 16, to which a pivot arm 18 carrying the ink roll 12 is pivotally supported at shaft 20.

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Temperature Compensation for Ink Rolls

In order to provide more uniform inking of type characters on a rotating print disc 10 from an ink roll 12 across the full temperature range of 50 degrees-130 degrees F, a bimetallic leaf spring 14 is utilized. The leaf spring is attached to a mounting arm 16, to which a pivot arm 18 carrying the ink roll 12 is pivotally supported at shaft 20.

The leaf spring 14 biases the arm 18 and hence the roll 12 against the print wheel 10. Thus with a stiffness decrease of approximately 25-30% in the elastomeric foam roll, the spring decreases its pressure on the ink roll correspondingly.

By controlling the embedment of the type in the roll 12, more uniform feeding of ink out of the roll onto the type characters on the disc 10 is effected. Also, bearing pressure on the pivot shaft 20 is controlled to prevent undue wear of the plastic shaft. Embedment control also reduces abrasion and wear of the type on the ink roll, as well as compensating for the change in ink viscosity due to the temperature change.

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