Recording head having electrically insulating layer having optim

Details Recording head having electrically insulating layer having optim Recording head having electrically insulating layer having optim

1992-08-20

1993-11-09

Fuller, Benjamin R.

Recorders

Thermal recording

346139C, 346155, B41J 2335

Patent

active

052607178

ABSTRACT:
A recording head including an electrically insulating layer, a plurality of recording electrodes and at least one return circuit electrode provided on the opposite sides of the insulating layer, the insulating layer and electrodes being adapted to be held, at a distal end of the head, in contact with the resistive layer. The electrically insulating layer has a surface waviness represented by maximum filtered waviness, of not larger than 0.40 .mu.m, where a high band cut-off value is 0.8 mm and a reference length is 2.5 mm, as measured in main scanning direction perpendicular to a stacking direction of the electrically insulating layer, the recording and return circuit electrodes. The insulating layer also has a surface roughness represented by center-line mean roughness, within a range of 0.02 .mu.m to 0.4 .mu.m, where a cut-off value is 0.8 mm and a measuring length is 2.5 mm, as measured in the main scanning direction.

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patent: 5132705 (1992-07-01), Takeuchi et al.

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