US3832117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unit for applying covering sheet for use in vacuum sealed molding
Assignee: Sintokogio Ltd
•
Filing: 1973-10-11
•
Granted: 1974-08-27
•
Expires: 1993-10-11
Abstract
Abstract A covering sheet applying unit and a method for heating said covering sheet in which a covering sheet holding frame is movably provided between a pattern plate for vacuum sealed molding mold and a heating means for uniformly heating the covering sheet to be applied on the surface of said pattern plate, a pressing plate is disposed at the end of the moving range of said holding frame, the covering sheet drawn from the web of the covering sheet is held on said holding frame and then moved in the vicinity of said pattern plate, and the covering sheet is, after being uniformly heated, applied on the pattern plate.
Inventors
- 👤 H Terada
- 👤 T Inoue
- 👤 I Hijikata
- 👤 M Kasazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:40
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/03; B22C7/00; Y; Y10; Y10S; Y10S425/00; Y10S425/20
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
383 words
A unit for applying a covering sheet on a pattern plate for vacuum sealed molding comprising, a window, frame-shaped covering sheet holding frame having an opening and a suction slot provided in the periphery of said opening for applying a vacuum suction to said covering sheet to suck the same thereto and adapted to hold said covering sheet substantially evenly over said opening and also adapted to reciprocate between an applying position for applying said covering sheet on said pattern plate and a receiving position for receiving and holding the covering sheet supplied to said opening; a covering sheet supply roll having said covering sheet wound thereon and arranged to supply the covering sheet to said holding frame moved to said receiving position; a covering sheet holding and pressing means having suction slots for holding said covering sheet by vacuum suction and adapted to hold said covering sheet substantially evenly over a plane covering said opening and also adapted to move for pressing the covering sheet supplied from said supply roll and held thereon onto said holding frame moved to said receiving position to apply said covering sheet substantially evenly on said holding frame and further adapted to again hold, after the movement of said holding frame to said applying position, the covering sheet drawn to said receiving position from said supply roll due to the movement of said holding frame; a covering sheet cutting means provided between said applying position and said receiving position and adapted to cut the covering sheet to be applied on said pattern plate after said holding frame has moved To said applying position and said covering sheet holding and pressing means has held the covering sheet drawn to said receiving position; a covering sheet heating means adapted to heat the covering sheet held on said holding frame located in said applying position for facilitating plastic deformation of said covering sheet when said covering sheet is applied on said pattern plate; and a pattern plate moving means adapted to carry said pattern plate and arranged to move said pattern plate to said applying position for applying on said pattern plate the heated covering sheet held on said holding frame and also adapted to move said pattern plate with said covering sheet applied thereon to a position for molding.
Claim 2
Dependent Claim
383 words
A unit for applying a covering sheet on a pattern plate for vacuum sealed molding comprising, a window, frame-shaped covering sheet holding frame having an opening and a suction slot provided in the periphery of said opening for applying a vacuum suction to said covering sheet to suck the same thereto and adapted to hold said covering sheet substantially evenly over said opening and also adapted to reciprocate between an applying position for applying said covering sheet on said pattern plate and a receiving position for receiving and holding the covering sheet supplied to said opening; a covering sheet supply roll having said covering sheet wound thereon and arranged to supply the covering sheet to said holding frame moved to said receiving position; a covering sheet holding and pressing means having suction slots for holding said covering sheet by vacuum suction and adapted to hold said covering sheet substantially evenly over a plane covering said opening and also adapted to move for pressing the covering sheet supplied from said supply roll and held thereon onto said holding frame moved to said receiving position to apply said covering sheet substantially evenly on said holding frame and further adapted to again hold, after the movement of said holding frame to said applying position, the covering sheet drawn to said receiving position from said supply roll due to the movement of said holding frame; a covering sheet cutting means provided between said applying position and said receiving position and adapted to cut the covering sheet to be applied on said pattern plate after said holding frame has moved To said applying position and said covering sheet holding and pressing means has held the covering sheet drawn to said receiving position; a covering sheet heating means adapted to heat the covering sheet held on said holding frame located in said applying position for facilitating plastic deformation of said covering sheet when said covering sheet is applied on said pattern plate; and a pattern plate moving means adapted to carry said pattern plate and arranged to move said pattern plate to said applying position for applying on said pattern plate the heated covering sheet held on said holding frame and also adapted to move said pattern plate with said covering sheet applied thereon to a position for molding.
Claim 3
Dependent Claim
31 words
A unit as claimed in claim 1 in which said covering sheet cutting means includes heating wires and is adapted to cut said covering sheet by heating and melting the same.
Claim 4
Dependent Claim
90 words
A unit as claimed in claim 1 in which said covering sheet holding frame has wheels, and said unit further comprises a rotating driving means adapted to make normal and reverse rotations, driving wheels adapted to make normal and reverse rotations by means of said driving means, follower wheels, and a chain means in engagement with said driving and follower wheels and having both ends thereof connected to said holding frame constitute an endless form and arranged to reciprocate said holding frame between said applying position and said receiving position.
Claim 5
Dependent Claim
24 words
A unit as claimed in claim 1 in which a permeable filler is filled in the suction slot of said covering sheet holding frame.
Claim 6
Dependent Claim
26 words
A unit as claimed in claim 1 in which a permeable filler is filled in the suction slots of said covering sheet holding and pressing means.
Claim 7
Dependent Claim
85 words
A unit as claimed in claim 1 in which said pattern plate moving means comprises a rotating means adapted to move said pattern plate between a first position and a second position, and a piston and cylinder means adapted to, in said first position, reciprocate said pattern plate between said applying position and a remote position apart from said applying position and, in said second position, reciprocate said pattern plate between said position for molding and a remote position apart from said position for molding.
Claim 8
Dependent Claim
61 words
A unit as claimed in claim 1 in which a compressed air discharging means is provided which is adapted to discharge compressed air so that, while said heating means is heating the covering sheet held on said holding frame, the high temperature air heated by said heating means is forcedly put in a convection movement for uniformly heating said covering sheet.
Claim 9
Dependent Claim
68 words
A unit as claimed in claim 7 in which said heating means is fixed to an attaching plate means provided opposite to the covering sheet held on said holding frame, and said compressed air discharging means is arranged such that said compressed air is discharged into a space defined by the covering sheet held on said holding frame and said attaching plate means and including said heating means.
Claim 10
Dependent Claim
51 words
A unit as claimed in claim 8 in which said covering sheet holding frame makes a reciprocating movement in the vertical direction, and said compressed air discharging means is so arranged that the compressed air is discharged into said space vertically downward from upper part to lower part of the space.
Claim 11
Dependent Claim
47 words
A unit as claimed in claim 7 in which said attaching plate means has a side wall means formed as surrounding said space to prevent outflow of the high temperature air put in a convection movement within said space and inflow of external air into said space.
Claim 12
Dependent Claim
18 words
A unit as claimed in claim 1, wherein said covering sheet heating means is an electric heating means.
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |