US4072959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recorder operating with drops of liquid
Assignee: Siemens AG
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Filing: 1976-04-29
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Granted: 1978-02-07
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Expires: 1996-04-29
Abstract
Abstract A recorder operating with drops of liquid for point-by-point recording of analog curves or alphanumerical characters and of images. Nozzles are arranged in rows for producing the individual points. In front of inlet openings of the nozzles, contacted piezoelectric transducers are arranged so that as a result of electrical potential variation at the contact, ink is expelled from the nozzle. Recording means is located in front of the exit opening of the nozzles, and the transducers are in the form of rod-shaped elements for producing the piezoelectric movements. The transducers are arranged in the form of teeth of a comb, with the free end zone of the rods assigned to one respective inlet opening of each of the nozzles. The rods, with their free front areas, are arranged in front of the inlet openings of the nozzles so that the lengthwise axes of the rods and the lengthwise axes of the nozzles are aligned with the contact on the rods. In this manner, potential variations of the contacts cause a change in the length of the rods.
Inventors
- 👤 Rune Elmqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:27
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/135; B41J2/14; B41J2/14201; B41J2/14282; B41J2002/14387
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
147 words
A recorder operating with drops of liquid for point-by-point recording of analog curves or alphanumerical characters and images, comprising in combination, a plurality of nozzles positioned next to one another in rows in a common member for producing the individual points, said nozzles having inlet openings and exit openings contacted piezoelectric transducer positioned in front of said inlet openings and arranged so that as a result of electrical potential variations at the contacts, ink is expelled from the nozzle; recording means to which the expelled ink is applied located in front of the exit openings of the nozzles; said transducers comprising rod-shaped piezoelectric transducers for generating piezoelectric movements, said transducers being arranged in the form of teeth of a comb having base ends commonly joined together with unjoined free end zone of each of the rods assigned to the respective inlet opening of each of the nozzles.
Claim 2
Dependent Claim
147 words
A recorder operating with drops of liquid for point-by-point recording of analog curves or alphanumerical characters and images, comprising in combination, a plurality of nozzles positioned next to one another in rows in a common member for producing the individual points, said nozzles having inlet openings and exit openings contacted piezoelectric transducer positioned in front of said inlet openings and arranged so that as a result of electrical potential variations at the contacts, ink is expelled from the nozzle; recording means to which the expelled ink is applied located in front of the exit openings of the nozzles; said transducers comprising rod-shaped piezoelectric transducers for generating piezoelectric movements, said transducers being arranged in the form of teeth of a comb having base ends commonly joined together with unjoined free end zone of each of the rods assigned to the respective inlet opening of each of the nozzles.
Claim 3
Dependent Claim
57 words
The recorder as defined in claim 1, wherein said rods have free front ends thereof arranged in front of the inlet openings of said nozzles so that the longitudinal axes of said rods and the longitudinal axes of said nozzles are aligned so that potential variations at the contacts produce a change in length of a rod.
Claim 4
Dependent Claim
28 words
The recorder as defined in claim 1, including means for supporting said rods at their two ends, said nozzles being located in the central region of said rods.
Claim 5
Dependent Claim
25 words
The recorder as defined in claim 1, including a comb-shaped base connecting at least two adjacent rods at their ends facing away from the nozzles.
Claim 6
Dependent Claim
19 words
The recorder as defined in claim 4, wherein said base and said rods are of one piece integral element.
Claim 7
Dependent Claim
78 words
The recorder as defined in claim 1, wherein said rods have predetermined shapes and said contacts are arranged so that upon electrical potential variations at the contacts, said rods bend transversely to the longitudinal axes of said rods, said rods being arranged in front of the respective nozzles so that the plane of flexure passes through the longitudinal direction of said nozzles, the longitudinal axes of the individual nozzles intersecting perpendicular the longitudinal axes of the respective rods.
Claim 8
Dependent Claim
15 words
The recorder as defined in claim 6, wherein said rods are comprised of bilaminar material.
Claim 9
Dependent Claim
29 words
The recorder as defined in claim 7, wherein said bilaminar material is a combination of piezoceramics and metal, the ceramic and the metal having the same thermal expansion coefficient.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |