Browse Prior Art Database

Tape Threader for a Leader Block Carried in a Tape Cartridge

IP.com Disclosure Number: IPCOM000099850D
Original Publication Date: 1990-Feb-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 1 page(s) / 50K

Publishing Venue

IBM

Related People

Linzell, RA: AUTHOR

Abstract

A rotary tape threader arm has a pivoted threading sub-assembly at its distal end. A leader block engaging pin in the threading sub-assembly is cammed into a tape-leader block engaging position. Such camming allows for increased manufacturing tolerances.

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Tape Threader for a Leader Block Carried in a Tape Cartridge

       A rotary tape threader arm has a pivoted threading
sub-assembly at its distal end.  A leader block engaging pin in the
threading sub-assembly is cammed into a tape-leader block engaging
position.  Such camming allows for increased manufacturing
tolerances.

      The figure shows a threader assembly being returned to a
cartridge.  The leaderblock engaging pin travels in a purely radial
fashion as dictated by the main arm.  The sub-arm remains against the
main-arm hard stop.  When the threading arm is within a few degrees
of the home position at the cartridge, the threading pin becomes
guided by the cam plate.  The cam plate is configured such that the
angle at which the threading pin approaches its home position in the
cartridge is an optimal leader block engaging angle of approach.  The
net effect is that the effective length of the threader assembly
increases to allow the threading pin to follow the cam plate.

      The use of a pivoting sub-arm is not the only means by which
the effective length of the threading assembly can be increased.  The
assembly could be a linear-telescoping type as well, or any variation
on these two basic themes.