Method and apparatus for sensing the length of label or tag medi

Details Method and apparatus for sensing the length of label or tag medi Method and apparatus for sensing the length of label or tag medi

1995-01-09

1996-01-23

Yan, Ren

Typewriting machines

Means auxiliary to typewriting function

Indicator means

400 56, 25055927, G01N 2186

Patent

active

054860636

ABSTRACT:
A method and associated apparatus for determining edges of tags/labels carried by a backing strip over a fixed surface. The method comprises the steps of, disposing a sensor above the fixed surface measuring the distance to a surface passing beneath it and outputting a first signal reflecting the distance; receiving and amplifying the first signal to a usable level second signal and outputting the second signal; and, receiving and comparing changes in the second signal to a pre-established threshold amount and outputting a third signal indicating an edge has been found when the second signal changes more than the pre-established threshold amount. Contacting and non-contacting approaches to accomplishing the measurement are disclosed.

REFERENCES:
patent: 5010766 (1991-04-01), Typpo
patent: 5188028 (1993-02-01), Reichel
patent: 5193918 (1993-03-01), Lohrmann et al.
patent: 5204537 (1993-04-01), Bennet et al.

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