EP0178887A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Ink jet apparatus
Assignee: Ricoh Printing Systems America Inc
•
Filing: 1985-10-14
•
Granted: —
•
Expires: 2005-10-14
Abstract
Abstract (57) An ink jet apparatus has a manifold (39) and a matched feed tube (37,38) connecting the manifold with an ink reservoir (40) so as to effectively present the large compliance characteristic of the reservoir at the manifold, thereby enabling a reduced volume print head construction which efficiently reduces cross talk and vibrational problems.
Inventors
- 👤 Thomas William Deyoung
- 👤 John Atwater Mccormick
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 14:03
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/17; B41J2/175
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
95 words
Ink jet apparatus comprising: an ink jet chamber portion containing a plurality of ink jet chambers, each chamber having an ink inlet and an ink ejecting orifice; reservoir means for holding a supply of ink, said reservoir having at least one portion located in very close proximity to said chamber portion; and ink feed means for feeding ink from said reservoir to said chambers, including a common manifold in communication with the several chamber inlets and a feed tube connecting said reservoir with said manifold, said feed tube and manifold having substantially matching cross-sectional areas.
Claim 2
Dependent Claim
95 words
Ink jet apparatus comprising: an ink jet chamber portion containing a plurality of ink jet chambers, each chamber having an ink inlet and an ink ejecting orifice; reservoir means for holding a supply of ink, said reservoir having at least one portion located in very close proximity to said chamber portion; and ink feed means for feeding ink from said reservoir to said chambers, including a common manifold in communication with the several chamber inlets and a feed tube connecting said reservoir with said manifold, said feed tube and manifold having substantially matching cross-sectional areas.
Claim 3
Dependent Claim
40 words
An ink jet apparatus according to claim 1, comprising a transducer support portion which houses an array of transducers corresponding respectively to said jet chambers, and wherein said feed tube is a substantially circular cross-sectional passage through said support portion.
Claim 4
Dependent Claim
23 words
An ink jet apparatus according-to claim 1 or 2, wherein said manifold comprises a passage through said suppoprt portion of substantially semi-cylindrical form.
Claim 5
Dependent Claim
43 words
An ink jet apparatus according to claim 1 or 2, wherein said manifold comprises a passage through said chamber portion having a substantially semi-cylindrical cross-sectional form, and said feed tube has an upper outlet from said support portion which communicates with said manifold.
Claim 6
Dependent Claim
25 words
An ink jet apparatus according to any preceding clailm, wherein said feed tube is relatively short in length compared with the length of said manifold.
Claim 7
Dependent Claim
25 words
An ink jet apparatus according to any preceding clailm, wherein said feed tube is relatively short in length compared with the length of said manifold.
Claim 8
Dependent Claim
19 words
An ink jet apparatus according to any preceding claim, wherein said feed tube is about one inch in length.
Claim 9
Dependent Claim
30 words
An ink jet apparatus according to any preceding claim, wherein the combined length of said manifold and said feed tube is in the range of about three to four inches.
Claim 10
Dependent Claim
19 words
An ink jet apparatus according to any preceding claim, wherein said reservoir portion is located below said chamber portion.
Claim 11
Dependent Claim
19 words
An ink jet apparatus according to any preceding claim, wherein said reservoir portion is located below said chamber portion.
Claim 12
Dependent Claim
18 words
An ink jet apparatus according to any preceding claim, wherein said manifold has a low compliance inner wall.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.