Ink ejection type writing unit

Details Ink ejection type writing unit Ink ejection type writing unit

1975-08-07

1977-03-29

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

222108, G01D 1518

Patent

active

040152723

ABSTRACT:
A writing unit for applying fluid droplets to a surface includes a chamber which is divided into an outer chamber portion and an inner chamber portion which are connected by a connecting channel. A discharge channel is connected to the outer chamber portion in alignment with the connecting channel. A piezoelectrical transducer is provided adjacent the inner chamber portion opposite to the outer chamber portion to produce short duration pressure increases to eject the liquid in the chamber from the discharge channel in pulsed jets to the surface. The inner and outer chamber portions are communicated to the atmosphere by respective vent passageways to withdraw the air in the chamber when the writing unit is first loaded with liquid and the bubbles introduced into the liquid in the chamber during normal operation. The vent passageways are closed during ink ejection process.

REFERENCES:
patent: 2036120 (1936-03-01), Cheetham et al.
patent: 3657599 (1972-04-01), Kashio
patent: 3708798 (1973-01-01), Hildenbrand et al.
patent: 3747120 (1973-07-01), Stemme
patent: 3900162 (1975-08-01), Titus et al.

Affiliated with

Also associated with

Rating

Ink ejection type writing unit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ink ejection type writing unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ink ejection type writing unit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-551956