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Print Band Transducer Assembly with No Requirements for Adjustments

IP.com Disclosure Number: IPCOM000109340D
Original Publication Date: 1992-Aug-01
Included in the Prior Art Database: 2005-Mar-23
Document File: 2 page(s) / 73K

Publishing Venue

IBM

Related People

Jalanti, DJ: AUTHOR

Abstract

Band printers, such as the IBM 6262 Model 22, utilize a print band D with raised timing marks C. The timing marks pass through a very narrow gap between support bearing F and pole face B of transducer A (Fig. 1). Previously the gap was set by feeler gage with a gap tolerance of only +/- .001 in. In addition, the transducer was adjusted when installed to the front unit casting J. This adjustment is required to obtain the maximum tension possible between the support bearing F and the print band D while maintaining adequate clearance between the print band timing marks C and the band casting J (Fig. 2).

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Print Band Transducer Assembly with No Requirements for Adjustments

       Band printers, such as the IBM 6262 Model 22, utilize a
print band D with raised timing marks C.  The timing marks pass
through a very narrow gap between support bearing F and pole face B
of transducer A (Fig. 1).  Previously the gap was set by feeler gage
with a gap tolerance of only  .001 in.  In addition, the
transducer was adjusted when installed to the front unit casting J.
This adjustment is required to obtain the maximum tension possible
between the support bearing F and the print band D while maintaining
adequate clearance between the print band timing marks C and the band
casting J (Fig. 2).

      Using a gage to adjust the transducer gap is difficult and
prone to error.  If the gap is too large the signal produced is weak.
If the gap is too small the print band timing marks may strike the
pole face B of the transducer A so as to damage it.  Either of these
situations cause band checks which shut the unit down.  The
adjustment of the transducer assembly K on the band casting J can
also cause problems.  If the transducer assembly K is adjusted too
far in one direction, the print band timing marks C may strike the
band casting J.  If the adjustment is too far in the other direction,
there is not enough tension between the print band D and the support
bearing F, causing the band D to skid on bearing F.

      The above problems are eliminated by providing transducer base
...