Printing – Embossing or penetrating – Special-article machines
Patent
1995-07-26
1997-01-07
Hilten, John S.
Printing
Embossing or penetrating
Special-article machines
101 9, 101 27, B31F 107
Patent
active
055905951
ABSTRACT:
A method and apparatus for a hot stamp imprinter which imprints ink from an inked print ribbon onto a substrate. The imprinter includes multiple printhead assemblies, with one or more heater elements, mounted on a frame. An actuatable backup assembly, also mounted on the frame, corresponds to each printhead assembly, wherein the backup assemblies are actuatable in series or parallel, to move, from a rest position, toward the printhead assembly, to an imprint position, to transfer ink from the print ribbon onto the substrate. A temperature probe disposed in each printhead is coupled to the control unit, which individually and sequentially energizes the heater elements of the respective printheads so that only one printhead assembly is energized at any one time. A spring biased dancer assembly having a idler roller maintains a tension on the inked print ribbon as the inked print ribbon is transferred from a supply reel to a rewind reel. The dancer assembly is coupled to a first encoder which controls a drag brake on the supply reel based on a position of the dancer assembly. A second idler roller is coupled to a second encoder for measuring the rate at which the ribbon is transferred from the supply reel to the rewind reel. The control unit increments the inked print ribbon a short interval to move an unused portion of the inked print ribbon between the printhead and backup assemblies, and then, after a subsequent imprint, increments the print ribbon a long interval to move an unused portion of the ribbon between the printhead and backup assemblies.
REFERENCES:
patent: 3634174 (1972-01-01), Warsager
patent: 3878776 (1975-04-01), Schneider
patent: 4160410 (1979-04-01), Fichter
patent: 4416199 (1983-11-01), Davison
Barczak Charles R.
Jezuit Arthur D.
Thompson James A.
Hilten John S.
Illinois Tool Works Inc.
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