US3649152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum forming machine
Assignee: ACADEMIC DIMENSION SYSTEMS Inc
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Filing: 1970-07-09
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Granted: 1972-03-14
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Expires: 1990-07-09
Abstract
Abstract A vacuum forming machine comprises a base structure, a porous plate spacedly mounted on the base structure, and a blower mounted on the base for drawing air through the porous plate. A clamping frame for plastic sheets conforms closely to the perimetric contour of the porous plate. The frame is pivoted for movement to a heating element on the base and to the porous plate, which is then inserted through an opening in the frame. A leveling arrangement is mounted on the frame and/or the porous plate, for spacing the frame from the base and for aligning the frame with the adjacent edge of the porous plate.
Inventors
- 👤 John W Knack Sr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:02
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
151 words
In a vacuum forming machine, the combination comprising a base structure for said machine, a porous plate structure spacedly mounted on said base structure, duct and blower means mounted on said base structure for drawing air through said plate porous structure, a clamping frame for plastic sheet material and the like, said frame conforming closely to the perimetric contour of said porous plate structure, means for mounting and pivotally moving said frame between a first position on said base structure adjacent a heating element thereof and a second position whereat said plate structure is inserted through an opening in said frame, and at least one foot member mounted on a lower surface of said frame remote from said hinge means, said foot member being engageable with an adjacent surface of said base structure for spacing said frame therefrom and for aligning said frame with the adjacent edge of said plate member.
Claim 2
Dependent Claim
151 words
In a vacuum forming machine, the combination comprising a base structure for said machine, a porous plate structure spacedly mounted on said base structure, duct and blower means mounted on said base structure for drawing air through said plate porous structure, a clamping frame for plastic sheet material and the like, said frame conforming closely to the perimetric contour of said porous plate structure, means for mounting and pivotally moving said frame between a first position on said base structure adjacent a heating element thereof and a second position whereat said plate structure is inserted through an opening in said frame, and at least one foot member mounted on a lower surface of said frame remote from said hinge means, said foot member being engageable with an adjacent surface of said base structure for spacing said frame therefrom and for aligning said frame with the adjacent edge of said plate member.
Claim 3
Dependent Claim
32 words
The combination according to claim 1 wherein a pair of said foot members are provided, said foot members being secured to said frame adjacent corner sections thereof remote from said hinge means.
Claim 4
Dependent Claim
36 words
The combination according to claim 2 wherein a frame supporting bracket is secured to said plate structure at a location remote from said feet members for engagement and alignment of the adjacent portion of said frame.
Claim 5
Dependent Claim
130 words
In a vacuum forming machine, the combination comprising a base structure for said machine, a porous plate structure spacedly mounted on said base structure, duct and blower means mounted on said base structure for drawing air through said plate porous structure, a clamping frame for plastic sheet material and the like, said frame conforming closely to the perimetric contour of said porous plate structure, means for mounting and pivotally moving said frame from a first position on said base structure adjacent a heating element thereof to a second position whereat said plate structure is inserted through an opening in said frame, and means secured to at least one of said frame and said plate structure for engaging and aligning said frame relative to said plate structure at said second posItion.
Claim 6
Dependent Claim
130 words
In a vacuum forming machine, the combination comprising a base structure for said machine, a porous plate structure spacedly mounted on said base structure, duct and blower means mounted on said base structure for drawing air through said plate porous structure, a clamping frame for plastic sheet material and the like, said frame conforming closely to the perimetric contour of said porous plate structure, means for mounting and pivotally moving said frame from a first position on said base structure adjacent a heating element thereof to a second position whereat said plate structure is inserted through an opening in said frame, and means secured to at least one of said frame and said plate structure for engaging and aligning said frame relative to said plate structure at said second posItion.
Claim 7
Dependent Claim
35 words
The combination according to claim 4 wherein said engaging and aligning means include at least three bracket members secured to said plate structure and spaced thereabout for engagement by and alignment of said frame member.
Claim 8
Dependent Claim
50 words
The combination according to claim 5 wherein said bracket members are each secured to a bottom surface of said plate member and include an outward, downwardly stepped section positioned to engage said frame and to align upper edge portions of said frame with an upper perimeter of said plate structure.
Claim 9
Dependent Claim
48 words
The combination according to claim 4 wherein said engaging and aligning means include a bracket member secured to said plate structure and at least one foot member secured to said frame member and engageable with an adjacent surface of said base structure to space said frame member therefrom.
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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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |