Electrical stamp device with ink temperature compensation for stencil paper perforation
April 6, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2499472 3799053 Stencil paper for mimeography and process for making stencil Stencilling a unique machine-readable marking on each of a plurality of workpieces Temperature control device for a printing head Protection circuit for drive transistor of printer head Power circuit for thermal head Apparatus for recording and reproducing digital signals on magnetic tape Thermal printing method Gradation control device for thermal ink-transfer type printing apparatus InventorsAssigneeApplicationNo. 864349 filed on 04/06/1992US Classes:400/120.13, By transfer material or record receiver101/93.04, Segmented print character printers (e.g., dots, etc.)101/128.21, Laminated and/or plural sheets and/or coated base and manufacture347/171THERMAL MARKING APPARATUS OR PROCESSESExaminersPrimary: Eickholt, Eugene H.Attorney, Agent or FirmForeign Patent References
International ClassB41J 003/02Foreign Application Priority Data1991-05-10 JPAbstractA stamp device is capable of selecting a current supply time for use by a thermal head in accordance with an ink temperature detected by a temperature sensor so as to control the size of perforations to be formed on a heat sensitive stencil paper by the thermal head. Therefore, the stamp device can form uniform images even when there is a variation in the viscosity of ink caused by changes in the evironmental temperature of the stamp device.Other References
Field of SearchPiercing machinesSTENCILING Cutting and feeding or delivering Feeding or delivering Internal inker Contact member Stencil-web machines Endless band Stencil and pad inker Stencil and work support Laminated and/or plural sheets and/or coated base and manufacture Manufacture Transfer With means to vary intensity of print impression Segmented print character printers (e.g., dots, etc.) Cutout character for stencil | |
