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US 4,901,093 AGranted
Method and apparatus for printing with ink jet chambers utilizing a plurality of orifices
AssigneeDataproducts Corporation
InventorsRichard Ruggiero, William R. Gardner, Robert L. Rogers
Life of this patent
Estimating the term…
Abstract
An impulse ink jet apparatus provides bar coding using one or more ink jet chambers having a plurality of orifices in each chamber. A transducer is coupled to each chamber for ejecting droplets from each of the plurality of orifices in the chamber in response to the state of energization of the transducer.
Claims26
An impulse ink jet apparatus comprising:
- an elongated chamber including an inlet, a first wall having a plurality of ejection orifices forming an elongated array substantially coextensive with said chamber, and a movable, second wall opposite said first wall and coextensive with said chamber;
- ink supply means coupled to said inlet;
- and
- transducer means, including an elongated member having an axis of elongation which is perpendicular to said elongated array, said elongated member being adapted to expand and contract along said axis of elongation in response to its state of energization to move said second wall of said chamber substantially as a plane toward said plurality of ejection orifices, for simultaneously ejecting droplets with substantially uniform velocity from each orifice of said plurality of ejection orifices.
1 more element
A method of simultaneously generating a pattern of droplets on demand utilizing an impulse ink jet apparatus comprising a chamber having a first wall and a second wall, a plurality of orifices in said first wall forming an array substantially coextensive with said chamber, and means for changing the volume of ink in said chamber, said method comprising the following steps:
- changing the volume of ink in said chamber by moving said second wall substantially as a plane towards said first wall, wherein said plane is substantially parallel to said array;
- and
- simultaneously ejecting a droplet from each orifice of said plurality of orifices at a substantially uniform velocity.
The impulse ink jet apparatus comprising:
- a plurality of chambers with each of said chambers including an inlet and a plurality of ejection orifices arranged substantially coextensive with said chamber;
- ink supply means coupled to said inlet;
- and
- a plurality of transducer means respectively coupled to said chambers to form a movable wall in each said chamber that is substantially coextensive with its respective chamber for ejecting droplets with substantially uniform velocity from each of said plurality of ejection orifices of each of said chambers in response to the state of energization of each of said plurality of transducer means, each said transducer means including an elongated member having an axis of elongation which is perpendicular to said plurality of ejection orifices;
- wherein said elongated member is adapted to expand and contract along said axis of elongation in response to its state of energization to move said wall substantially as a plane toward said plurality of ejection orifices.
2 more elements
A bar code ink jet apparatus comprising:
- an impulse ink jet chamber including a plurality of linearly aligned orifices extending substantially coextensive with said chamber in a first wall thereof, said chamber also including a movable second wall that is substantially coextensive with said chamber;
- means for simultaneously ejecting a plurality of droplets from said linearly aligned orifices with substantially uniform velocity by moving said second wall substantially as a plane towards said first wall, wherein said plane is substantially parallel to said linearly aligned orifices;
- means for creating a relative scanning motion between said ink jet chamber and a target for receiving said droplets;
- and
- means for controlling said means for simultaneously ejecting so as to sequentially eject a plurality of droplets and to deposit said pluralities of droplets in bars of varying widths.
2 more elements
A bar code ink jet apparatus comprising:
- a plurality of ink jet chambers, each of said chambers including a first wall, a movable second wall, and a plurality of linearly aligned orifices that extend substantially coextensive with said chamber along said first wall, where the orifices in one of said chambers are parallel with the orifices in another of said chambers;
- means for simultaneously ejecting a plurality of droplets from said aligned orifices in each of said chambers with substantially uniform velocity by moving said second wall substantially as a plane towards said first wall, wherein said plane is substantially parallel to said linearly aligned orifices;
- means for creating a relative scanning motion between said ink jet chambers and a target for receiving said droplets;
- and
- means for controlling said means for simultaneously ejecting so as to selectively eject a plurality of droplets from orifices of one or more than one of said chambers thereby controlling the overall length of the bars deposited on the target.
2 more elements
Dependencies are inferred from the claim text.