Patent US3220902A successfully refreshed from Google Patents.
US3220902A
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Laminated container forming method and apparatus
Assignee: Illinois Tool Works Inc
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Filing: 1964-05-05
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Granted: 1965-11-30
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Expires: 1984-05-05
Abstract
No abstract record available.
Inventors
- 👤 Edwards Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:15
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/40; B29C66/41; B29C66/45; B29C44/00; B29C44/34; B29C44/56; B29C44/5627; B29C44/5636; B29C65/00; B29C65/02; B29C65/14; B29C65/1429; B29C65/1432; B29C65/1445; B29C65/1464; B29C65/1467; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/70; B29C66/71; B29C66/72; B29C66/727; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B32; B32B; B32B27/00; B29C65/022; B29C65/028; B29C65/1403; B29C65/1412; B29K; B29K2105/00; B29K2105/04; B29L; B29L2009/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/249993
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A METHOD OF FORMING AN INSULATED ARTICLE COMPRISING THE STEPS OF LAMINATING AN INTUMESCENT LOW DENSITY THERMOPLASTIC SHEET OF FOAM MATERIAL TO A RELATIVELY HIGH DENSITY SHEET OF THERMOPLASTIC MATERIAL, HEATING BOTH SIDES OF THE LAMINATE SHEET TO A TEMPERATURE IN THE VICINITY OF THE FORMING TEMPERATURE OF THE LOW DENSITY THERMOPLASTIC MATERIAL, THEN HEATING THE HIGH DENSITY THERMOPLASTIC PORTION OF THE LAMINATE TO A TEMPERATURE SUFFICIENT TO RUPTURE AT LEAST SOME OF THE LOW DENSITY FOAM MATERIAL IN THE VICINITY OF THE INITIAL BOUNDARY OF SAID SHEETS TO ALLOW MOVEMENT OF GASEOUS MATERIAL LIBERATED FROM SAID RUPTURED PORTION THEREBETWEEN, FORMING THE HEATED MATERIAL TO AN ARTICLE OF DESIRED CONFIGURATION BETWEEN OPPOSED MOLD MEMBERS, TRAPPING THE GASEOUS MATERIAL BETWEEN THE SHEETS IN PRESELECTED AREAS OF SAID FORMED ARTICLE BY MOVING SAID PRESELECTED AREAS INTO ENGAGEMENT WITH PROJECTIONS PROVIDED IN ONE OF SAID MOLD MEMBERS TO INCREASE THE EFFECTIVE THICKNESS AND THE INSULATING CHARACTERISTICS OF SAID ARTICLE IN SAID PRESELECTED AREAS, AND THEREAFTER CHILLING THE FORMED ARTICLE TO PROVIDE AN ARTICLE OF INSULATED CONSTRUCTION.
Claim 2
Independent Claim
173 words
A METHOD OF FORMING AN INSULATED ARTICLE COMPRISING THE STEPS OF LAMINATING AN INTUMESCENT LOW DENSITY THERMOPLASTIC SHEET OF FOAM MATERIAL TO A RELATIVELY HIGH DENSITY SHEET OF THERMOPLASTIC MATERIAL, HEATING BOTH SIDES OF THE LAMINATE SHEET TO A TEMPERATURE IN THE VICINITY OF THE FORMING TEMPERATURE OF THE LOW DENSITY THERMOPLASTIC MATERIAL, THEN HEATING THE HIGH DENSITY THERMOPLASTIC PORTION OF THE LAMINATE TO A TEMPERATURE SUFFICIENT TO RUPTURE AT LEAST SOME OF THE LOW DENSITY FOAM MATERIAL IN THE VICINITY OF THE INITIAL BOUNDARY OF SAID SHEETS TO ALLOW MOVEMENT OF GASEOUS MATERIAL LIBERATED FROM SAID RUPTURED PORTION THEREBETWEEN, FORMING THE HEATED MATERIAL TO AN ARTICLE OF DESIRED CONFIGURATION BETWEEN OPPOSED MOLD MEMBERS, TRAPPING THE GASEOUS MATERIAL BETWEEN THE SHEETS IN PRESELECTED AREAS OF SAID FORMED ARTICLE BY MOVING SAID PRESELECTED AREAS INTO ENGAGEMENT WITH PROJECTIONS PROVIDED IN ONE OF SAID MOLD MEMBERS TO INCREASE THE EFFECTIVE THICKNESS AND THE INSULATING CHARACTERISTICS OF SAID ARTICLE IN SAID PRESELECTED AREAS, AND THEREAFTER CHILLING THE FORMED ARTICLE TO PROVIDE AN ARTICLE OF INSULATED CONSTRUCTION.
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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) | 1968-11-29 | 1969-05-31 | 1969-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-29 | 1973-05-31 | 1973-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-29 | 1977-05-31 | 1977-11-30 | $7700.00 | Window Closed / Lapsed |