US3589022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air ventilating and circulating system for microwave dryers
Assignee: B Offen and Co Inc
•
Filing: 1969-11-17
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Granted: 1971-06-29
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Expires: 1989-11-17
Abstract
Abstract A web-drying apparatus comprising a microwave developing means formed of opposed applicators defining a passage for movement of web surfaces in closely spaced relationship to the applicator surfaces. The applicators define ridge portions which serve to concentrate microwaves on web surface areas for generating heat which results in drying action. Air-circulating and supplying means are associated with the applicators for moving air through openings in the ridges and for withdrawing air through openings defined in depressed areas located intermediate the ridges.
Inventors
- 👤 Henry H Hering Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:41
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/78; H05B6/788; B; B41; B41F; B41F23/00; B41F23/04; B41F23/0486; B41F23/0493; F; F26; F26B; F26B3/00; F26B3/32; F26B3/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
A construction in accordance with claim 1 including plate means for supporting said tubes, said plate means defining a plurality of openings, one set of said openings communicating with the openings defined by said tubes for the exhaust of air from said depressed areas, and a second set of said openings in said plate means located to provide communication between said passages defined between said tubes and said hollow interiors of said ridges.
Claim 2
Dependent Claim
43 words
A construction in accordance with claim 2 including an exhaust plenum overlying the tubes associated with each applicator and including additional openings in said tubes opposite the openings defined in said one wall for communication of said tubes with the associAted exhaust plenum.
Claim 3
Dependent Claim
33 words
A construction in accordance with claim 3 including a chamber located in surrounding relationship relative to the exhaust plenum and tubes of each applicator, said air supply means being connected to each chamber.
Claim 4
Dependent Claim
20 words
A construction in accordance with claim 4 including means for heating the air before it is introduced into said chambers.
References Cited (Backward Citations)
US3449836A
Cited
US3475827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |