Patent US4061817A successfully refreshed from Google Patents.
US4061817A
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Luggage shells and process for the manufacture thereof
Assignee: HITCO 840 NEWPORT CENTER DRIVE SUITE 260 NEWPORT BEACH CALIFORNIA 92660 A CORP OF CA
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Filing: 1975-06-30
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Granted: 1977-12-06
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Expires: 1995-06-30
Abstract
Abstract Light weight strong three dimensional luggage shells are produced by heating a glass fiber reinforced thermoplastic sheet containing 5% to 50% by weight glass fibers, and stamping the resultant expanded sheet while still hot between matched male and female cold dies. This is a continuation of application Ser. No. 483,793 , filed June 27, 1974, now abandoned.
Inventors
- 👤 John M. Maxel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:37
CPC Classifications
A; A45; A45C; A45C5/00; A45C5/02; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/266; Y10T428/269; Y10T442/00; Y10T442/30; Y10T442/3707; Y10T442/60; Y10T442/659
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
117 words
An article of luggage including in combination a molded three-dimensional self-supporting luggage shell consisting essentially of a glass fiber reinforced thermoplastic polymer sheet containing 5% to 50% by weight glass fibers distributed therein, said shell being covered with a sheet material, said shell having a thickness of approximately 0.04 to 0.06 inch as compressed from an initial sheet stock thickness of about 0.08 to 0.15 inch and said shell having a specific gravity throughout within the range of 0.90 to 1.40, said shell as compressed having a flexural strength within the range of 5,000 to 30,000 pounds per square inch and a notched izod impact resistance within the range of 2 to 15 foot pounds per inch.
Claim 2
Dependent Claim
117 words
An article of luggage including in combination a molded three-dimensional self-supporting luggage shell consisting essentially of a glass fiber reinforced thermoplastic polymer sheet containing 5% to 50% by weight glass fibers distributed therein, said shell being covered with a sheet material, said shell having a thickness of approximately 0.04 to 0.06 inch as compressed from an initial sheet stock thickness of about 0.08 to 0.15 inch and said shell having a specific gravity throughout within the range of 0.90 to 1.40, said shell as compressed having a flexural strength within the range of 5,000 to 30,000 pounds per square inch and a notched izod impact resistance within the range of 2 to 15 foot pounds per inch.
Claim 3
Dependent Claim
26 words
An article of luggage as claimed in claim 1 in which said thermoplastic polymer is selected from the group consisting of polyethylene, polypropylene, acrylonitrile-butadiene-styrene and polycarbonates.
Claim 4
Dependent Claim
16 words
An article of luggage as claimed in claim 1 in which said thermoplastic polymer is polypropylene.
Claim 5
Dependent Claim
18 words
An article of luggage as claimed in claim 1 in which said sheet material is a vinyl covering.
Claim 6
Dependent Claim
27 words
An article of luggage as claimed in claim 4 in which said vinyl covering has a backing of woven or non-woven fibers compatible with said thermoplastic polymer.
References Cited (Backward Citations)
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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) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |