US3566066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heating articles
Assignee: Dunlop Co Ltd
•
Filing: 1969-08-18
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Granted: 1971-02-23
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Expires: 1989-08-18
Abstract
Abstract Apparatus for heating or preheating a rubber article before moulding and vulcanization. The apparatus comprises a chamber, means for locating an article within the chamber in a position symmetrical within the space in the chamber, a closure member for enclosing the article in the chamber, and a wave guide for supply of microwave energy to the chamber for heating the article, the wave guide communicating with the space in the chamber via a wave guide entry in the base of the chamber, the entry being location in a position so as to establish a multimode distribution of energy in the chamber.
Inventors
- 👤 John B Borthwick
- 👤 Eric H Searle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:10
CPC Classifications
B; B29; B29D; B29D30/00; B29D30/06; B29D30/52; B29D30/54; B29C; B29C35/00; B29C35/02; B29C35/08; B29D30/0005; B29D30/0601; H; H05; H05B; H05B6/00; H05B6/64; H05B6/80; B29C2035/0283; B29C35/0805; B29C2035/0855; B29K; B29K2021/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
36 words
Apparatus according to claim 1 in which the chamber has a symmetrical cross section and the wave guide entry to the chamber is located asymmetrically with respect to the longitudinal axis of symmetry of the chamber.
Claim 2
Dependent Claim
19 words
Apparatus according to claim 1 in which the wave guide entry to the chamber is located adjacent the corner.
Claim 3
Dependent Claim
46 words
Apparatus according to claim 1 in which the chamber has a cross section equivalent to three quadrants of a circle plus a square which occupies the fourth quadrant of the circle the sides of the square having a length equal to the radius of the circle.
Claim 4
Dependent Claim
46 words
Apparatus according to claim 4 in which the wave guide entry is located at a position in the base of the chamber along the line joining the center of curvature of the circular portion of the base and the apex of the corner of the base.
Claim 5
Dependent Claim
16 words
Apparatus according to claim 1 in which means are provided for rotating the article during heating.
Claim 6
Dependent Claim
16 words
Apparatus accorDing to claim 1 in which means are provided for reciprocating the article during heating.
Claim 7
Dependent Claim
26 words
Apparatus according to claim 1 in which a shaft is provided in the chamber for location coaxially within an annular article to be heated or preheated.
Claim 8
Dependent Claim
24 words
Apparatus according to claim 8 in which the means for locating the annular article within the chamber is a carrier attached to the shaft.
Claim 9
Dependent Claim
20 words
Apparatus according to claim 9 in which means for rotating and/or reciprocating the annular article are connected to the shaft.
Claim 10
Dependent Claim
34 words
Apparatus according to claim 1 in which a mode-stirrer is provided at the wave guide entry into the chamber to distribute energy transmitted by the wave guide within the space formed inside the chamber.
References Cited (Backward Citations)
US2495170A
Cited
US2738406A
Cited
US2961520A
Cited
US3102181A
Cited
US3182166A
Cited
US3436506A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |