Typewriting machines – Sheet or web – For feeding web record-medium
Reexamination Certificate
1998-10-30
2001-05-15
Colilla, Daniel J. (Department: 2854)
Typewriting machines
Sheet or web
For feeding web record-medium
C400S611000, C101S288000
Reexamination Certificate
active
06231253
ABSTRACT:
BACKGROUND OF THE INVENTION
In a printer, if a media having labels on a backing is provided for carrying the indicia, the labels may be separated or peeled off of the backing by the printer instead of dispensing the label on the backing and requiring that the user hand strip the label. Prior art methods of separating a label from a backing pulls the media with high tension which performed well for separating the labels from the backing, but causes printing registration problems and rewind control of the backing was difficult. Another prior art method scrapes the label off the backing by squeezing a sharp edge or pick against the backing which was pressed tightly against the platen roller without high tension on the backing.
The present invention provides a novel passive peel system which is used to separate or peel the labels easily from the backing with zero or low tension on the backing. In the present invention, this simplifies peeling, makes label printing registration easier to control, reduces the tension required on the backing which makes rewinding of the backing easier, and reduces cost.
Other features and advantages of the present invention will become apparent upon a reading of the attached specification, in combination with a study of the drawings.
OBJECTS AND SUMMARY OF THE INVENTION
An object of the present invention is to provide a printer which includes a novel passive peel system that is used to separate or to peel the labels easily from the backing with zero or low tension on the backing.
Briefly, and in accordance with the foregoing, the present invention provides a novel passive peel system for a printer, such as a thermal printer or a thermal demand printer, for peeling labels off of a backing after indicia has been printed on the labels. When the labels are secured to the backing, this is defined as media.
The printer has a housing, printhead means associated with the housing for printing the indicia on the labels and a platen roller associated with the housing.
A first embodiment of the passive peel system includes a peel tear bar proximate to the platen roller for bending the backing therearound and a separator bar proximate to the peel tear bar for separating the backing from the labels after the labels have been printed on by the printhead means. The media passes over the peel tear bar, the backing passes between the peel tear bar and the separator bar, and the labels pass over the separator bar. In this embodiment, the labels can be peeled with low tension or with zero tension on the backing.
A second embodiment of the passive peel system includes a peel tear bar and an anti-buckle bar mounted proximate to the peel tear bar for preventing buckling of the media as the media passes over the peel tear bar. In this embodiment, the media passes between the peel tear bar and said anti-buckle bar. When this second embodiment is used, the labels can be peeled from the media with low tension on the backing.
The third embodiment of the passive peel system is the same as the first embodiment with the addition of the anti-buckle bar of the second embodiment. When this third embodiment is used, the labels can be peeled from the backing with low tension or with zero tension on the backing.
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Henderson David L.
Liedtke Ronald Russell
Colilla Daniel J.
Trexler Bushnell Giangiorgi & Blackstone Ltd.
ZIH Corporation
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