Printing – Bed-and-platen machines – Web
Patent
1978-04-18
1980-06-24
Pieprz, William
Printing
Bed-and-platen machines
Web
156384, 101288, 101 9303, 101298, 101316, 4001573, 400166, 400437, B41J 500
Patent
active
042089646
ABSTRACT:
A contant pressure printing mechanism for use with a hand labeler which prints a label: an actuating lever, which is pivotally connected to the frame of the hand labeler, is divided into a hand lever and a printing lever, and both of these levers are also pivotally connected. A printing head is carried by the printing lever. The hand lever and the printing lever are biased to move together as a unit. The operating lever engages a snap mechanism which applies a preset resistance to rotation of the operating lever as the printing lever is turned toward the printing platen. In one embodiment, the snap mechanism includes a pressure roller and a snap bail. The pressure roller is rotatably mounted to either the hand lever or the frame of the hand labeler while the snap bail is mounted pivotally to the other. As the squeezing of the hand lever increases, the operating lever snaps past the snap mechanism and the snap movement urges the printing lever toward the platen. In another embodiment, the pressure roller is rotatably mounted to the printing lever while a snap member is pivotally mounted to the hand lever. In this embodiment, the pressure roller and the snap member hold the levers together and the pressure roller snaps past the snap member only after the printing head contacts the platen. In all cases, the printing head can be moved into abutment against the printing platen under a constant printing pressure and for a preset period. The printing head can also be returned from the platen by the action of the return spring immediately after it has abutted against the platen.
REFERENCES:
patent: 1064674 (1913-06-01), Ursbruck
patent: 1765326 (1930-06-01), Desha
patent: 3042357 (1962-07-01), Engholdt
patent: 4072105 (1978-02-01), Becker et al.
Kabushiki Kaisha Sato Kenkyusho
Pieprz William
LandOfFree
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