Patent US3822978A successfully refreshed from Google Patents.
US3822978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable vacuum forming apparatus
Assignee: Individual
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Filing: 1972-12-15
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Granted: 1974-07-09
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Expires: 1992-12-15
Abstract
Abstract A portable vacuum forming apparatus consisting of a housing parallelepiped in form including hinged portions comprising a heating member, a vacuum member and a material holding member hinged to said housing swingable between said heating member and said vacuum member, said material holding member comprising an outer frame and an inner frame seating therein, and hinge means connecting said frames, said means resiliently yielding to accommodate various thicknesses of sheet material disposed between said frames and means locking said frames in operating position.
Inventors
- 👤 W Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:31
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A portable vacuum forming apparatus including a vacuum member and a heating member, having in combination a material holding member comprising an outer frame member, an inner frame member seated within said outer frame member in operating position, said members having superposed flange portions holding a sheet of material therebetween, a hinge swingably connecting a pair of adjacent sides of said frame members, said hinge comprising a plurality of hinge plate members secured to said pair of adjacent sides of said frames, alternate of said hinged plate members being secured to said outer frame and the remaining of said hinged frame members being secured to said inner frame, said hinged plate members being in laterally spaced relation, said hinged plate members having axially aligned tubular portions, a flexible rod disposed through said tubular portions of said hinged plate members, and said rod flexing providing adjustable vertical spacing between said inner and outer frame members in operating position accommodating various thicknesses of sheet material therebetween.
Claim 2
Dependent Claim
164 words
A portable vacuum forming apparatus including a vacuum member and a heating member, having in combination a material holding member comprising an outer frame member, an inner frame member seated within said outer frame member in operating position, said members having superposed flange portions holding a sheet of material therebetween, a hinge swingably connecting a pair of adjacent sides of said frame members, said hinge comprising a plurality of hinge plate members secured to said pair of adjacent sides of said frames, alternate of said hinged plate members being secured to said outer frame and the remaining of said hinged frame members being secured to said inner frame, said hinged plate members being in laterally spaced relation, said hinged plate members having axially aligned tubular portions, a flexible rod disposed through said tubular portions of said hinged plate members, and said rod flexing providing adjustable vertical spacing between said inner and outer frame members in operating position accommodating various thicknesses of sheet material therebetween.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |