Print head assembly for non-impact printing

Details Print head assembly for non-impact printing Print head assembly for non-impact printing

B - Operations, Transporting

41

J

101/115

B41J 2/335 (2006.01)

Patent

CA 1199222

ABSTRACT A print head assembly with interchangeable pluggable printed circuit print heads (7) has means (23, 26) for automatically positioning a head during insertion with the aim of ensuring registration of printed circuit electrodes (12) on the head with correspondingly positioned conductors (5) on a body portion (1). The print heads (7) are supplied as a variety of types all of which are interchangeable as a simple push-fit in the body portion (1). A clamp (24, 26) ensures that ohmic contact is established and maintained between the registering electrodes and conductors. Each head (7) is also provided with a pattern of electrodes (14) which serve to identify the head type. The pattern bridges selected additional conductors on the body portion (1) and provides a decodable pattern of signals in response to an interrogate signal unique to heads of that type. One of these electrodes (14) on the head shorts a control conductor on the body portion to one or other of two adjacent guard conductors, if lateral misregistration of the head within the recess exceeds a predetermined amount.

426928

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