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Ribbon Feeding Speed Control Method

IP.com Disclosure Number: IPCOM000110635D
Original Publication Date: 1992-Dec-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 1 page(s) / 36K

Publishing Venue

IBM

Related People

Kanno, T: AUTHOR

Abstract

Disclosed is the method for speed control of an ink ribbon feeding. We sometimes find lighter patterns after all black image printing. It is caused by too much consumption of ink, and by less ink re-fill through a turn.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 90% of the total text.

Ribbon Feeding Speed Control Method

       Disclosed is the method for speed control of an ink
ribbon feeding.  We sometimes find lighter patterns after all black
image printing.  It is caused by too much consumption of ink, and by
less ink re-fill through a turn.

      This is a big problem for a re-inking type ink ribbon whose
ribbon length is shorter than a non re-inking-type ink ribbon (1.8 m
versus 13 m or 60 m), and the re-filled ink volume is designed to
compensate the ink volume used for typical character print.

      To improve this lighter print after heavy image printing
problem, this article proposes the speed control of an ink ribbon in
accordance with the image density.

      If the image density is heavier, the feeding speed should be
higher enough, and it causes to reduce ink consumption per ribbon
area, and, an ink re-fill capability will be sufficient for next
printing.

      This article can be applied easily to the printer which has the
ribbon feed motor independently.  And, it can also be applied to the
printer which has a speed change mechanism of ribbon feed, such as
gear change mechanism of two or more kinds of speed, and an operator
can change the speed manually.

      In the former case, the ribbon feed speed can be controlled
according to the dot duty data by a printer electronics.  In the
latter case, an operator changes the gear ratio manually to the light
image position or the heavy image position considering t...