Patent US4687725A successfully refreshed from Google Patents.
Patent US3358061A successfully refreshed from Google Patents.
US3358061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for heat shaping of plastic
Assignee: Individual
•
Filing: 1965-09-07
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Granted: 1967-12-12
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Expires: 1985-09-07
Abstract
No abstract record available.
Inventors
- 👤 Gidge Lester
- 👤 Jr Valmor R Poulin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:14
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/30; B29C51/36; B29C51/365; B29C51/34; Y; Y10; Y10S; Y10S425/00; Y10S425/048; Y10S425/812
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A METHOD OF VENTING ARTICLES OF SHEET PLASTIC MATERIAL BEING SHAPED IN HEAT SOFTENED CONDITION BETWEEN FORMING MEANS AND A DIE HAVING A SUBSTANTIALLY FLAT PLANAR FACE PORTION, SAID METHOD COMPRISING THE STEPS OF FORMING THE SAID PLANAR FACE PORTION OF SAID DIE IN AT LEAST TWO PART OF ALUMINUM, AND JUXTAPOSING SAID PARTS TO FORM A MECHANICALLY TIGHT, CLOSE FITTING ZERO CLEARANCE JOINT THEREBETWEEN, FORMING A HARD ANODIC OXIDE COATING ON THE SAID PLANAR ALUMINUM FACES OF SAID MEMBERS TO FORM MICROSCOPIC AIR CHANNELS THEREON TOO IMPERCEPTIBLE TO FORM VISIBLE MARKS IN THE FINISH OF SAID ARTICLE, FORMING A HARD ANODIC OXIDE COATING ON THE MATING ALUMINUM SURFACES OF THE ABUTTING SIDE WALLS OF SAID MEMBERS FORMING SAID JOINT IN THE FACE OF SAID DIE, TO FORM SAID MICROSCOPIC AIR CHANNERLS THEREALONG, AND SHAPING THE PLASTIC SHEET BY DIFFERENTIAL FLUID PRESSURE WHILE CHANNELING ANY AIR ENTRAPPED BETWEEN SAID SHEET MATERIAL AND THE SAID PLANAR FACE PORTION OF SAID DIE ALONG THE CHANNELS IN SAID FACES AND THENCE ALONG THE CHANNELS IN SAID JOINT TO THEREBY DISSIPATE SAID AIR.
Claim 2
Dependent Claim
169 words
IN APPARATUS FOR SHAPING ARTICLES FROM PLASTIC MATERIAL, SAID APPARATUS INCLUDING A FORMING RECESS WITH A FORMING FACE AND FLUID PRESSURE MEANS ACTING ON SAID PLASTIC MATERIAL TO PRESS THE SAME AGAINST SAID FACE, THE COMBINATION OF GAS PASSAGE MEANS IN SAID FACE, SAID MEANS COMPRISING AT LEAST TWO INDIVIDUAL MEMBERS OF IMPERFORATE METAL, SAID MEMEBERS EACH HAVING A FACE FORMING PART OF THE FACE OF SAID RECESS AND EACH HAVING A SIDE WALL CONTACT FITTING THE OTHER WITH ZERO CLEARANCE TO DEFINE A JOINT EXTENDING FROM THE FACE OF SAID RECESS AWAY FROM SAID PLASTIC MATERIAL, AND A HARD CRYSTALLINE SURFACE CONTAINING A MULTIPLICITY OF MICROSCOPIC PROTUBERANCES SEPARATED BY MICROSCOPIC RECESSES IN THE FORM OF POCK MARKS AND CRACKS, IMPERCEPTIBLE TO THE EYE, BUT EXTENDING OVER AT LEAST ONE OF THE SIDE WALLS OF SAID JOINT, SAID MICROSCOPIC RECESSES IN SAID SIDE WALL OF SAID JOINT, JOINTLY FORMING AN AIR PASSAGE IN THE FACE OF SAID RECESSES WHILE SAID JOINT CREATES NO VISIBLE MARK IN SAID PLASTIC MATERIAL.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |