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A single offset font identification opening in the central hub of a daisy wheel print element can be utilized for automatic printer set up.
English (United States)
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A single offset font identification opening in the central hub of a daisy wheel
print element can be utilized for automatic printer set up.
In the prior art, annular optically coded strips have been used for automatic
font identification. A fairly large area is required, and manufacturing costs are
excessive. In general, though, the pitch and type style are imprinted on the print
element. The operator procedure is to read the imprinted identification and
manually setup the printer. This is time consuming, particularly when in many
cases the choice of fonts is immaterial.
Consider 96 different print elements with each element having 96 character
petals. If identification openings are to be provided adjacent the petals, all 96
different elements can be identified by a single opening in each element.
Identification is accomplished through the use of a sensor and a counter.
Following installation of a print element in the printer, the operator procedure
calls for depressing a set-up button. Depression of the set-up button causes
rotation of the print element. Upon rotation of the print element, the counter is
incremented for each character petal until an opening is sensed by the sensor.
The sensing of the opening will automatically cause the printer to be set to the
A magnetic bead or insert can be used in place of the above-described