US4725393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for vacuum compression of laminated sheet material
Assignee: Kawakami Seisakusho KK
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Filing: 1986-09-30
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Granted: 1988-02-16
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Expires: 2006-09-30
Abstract
Abstract A laminate consisting of a number of air-permeable sheets of a material is placed on the supporting surface of a table, and a major portion of the periphery of the laminate, inclusive of a lower surface thereof, is covered with a sheet impermeable to air. A suction pipe is arranged on the supporting surface along at least one side surface of the laminate and has a suction port faced toward the one side surface. A peripheral portion of the suction port is covered with the air-impermeable sheet, and the laminate is compressed in the direction of its thickness by evacuating air from within a space defined by the air-impermeable sheet by vacuum producing means connected to the suction pipe. The air-impermeable sheet and laminate can be moved together with the suction pipe in parallel relation to the supporting surface, and they can be stopped at a desired position, during the evacuation process.
Inventors
- 👤 Nobuo Nasu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:32
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/22; B29C53/24; B32; B32B; B32B37/00; B32B37/10; B32B37/1018; B26; B26D; B26D7/00; B26D7/01; B26D7/018; B26D7/08; B32B2307/00; B32B2307/70; B32B2307/724; B32B2309/00; B32B2309/60; B32B2309/68; Y; Y10; Y10S; Y10S83/00; Y10S83/929; Y10S83/953; Y10T; Y10T83/00; Y10T83/343; Y10T83/748
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
170 words
A method of vacuum compressing a laminate consisting of a number of air-permeable sheets of a material, comprising the steps of: covering a major portion of the periphery of the laminate, inclusive of a lower surface thereof, with an air-impermeable sheet on a supporting surface; facing a suction port of a suction pipe, which is arranged on the supporting surface along at least one side surface of said laminate, toward said one side surface; covering a peripheral portion of said suction port with said air-impermeable sheet; compressing said laminate by evacuating air from within a space defined by said air-impermeable sheet by vacuum producing means connected to said suction pipe; moving said air-impermeable sheet and said laminate together with said suction pipe in parallel relation to said supporting surface in a state where the air is evacuated from within said space; and stopping said air-impermeable sheet and said laminate together with said suction pipe on said supporting surface in a state where the air is evacuated from within said space.
Claim 2
Independent Claim
170 words
A method of vacuum compressing a laminate consisting of a number of air-permeable sheets of a material, comprising the steps of: covering a major portion of the periphery of the laminate, inclusive of a lower surface thereof, with an air-impermeable sheet on a supporting surface; facing a suction port of a suction pipe, which is arranged on the supporting surface along at least one side surface of said laminate, toward said one side surface; covering a peripheral portion of said suction port with said air-impermeable sheet; compressing said laminate by evacuating air from within a space defined by said air-impermeable sheet by vacuum producing means connected to said suction pipe; moving said air-impermeable sheet and said laminate together with said suction pipe in parallel relation to said supporting surface in a state where the air is evacuated from within said space; and stopping said air-impermeable sheet and said laminate together with said suction pipe on said supporting surface in a state where the air is evacuated from within said space.
Claim 3
Dependent Claim
25 words
The method according to claim 1, wherein said air-impermeable sheet and said laminate are moved together with said suction pipe while being held by hand.
Claim 4
Dependent Claim
41 words
The method according to claim 1, wherein said air-impermeable sheet and said laminate are moved together with said suction pipe in a direction perpendicular to a longitudinal direction of said suction pipe extending along the one side surface of said laminate.
Claim 5
Dependent Claim
30 words
The method according to claim 1, wherein said air-impermeable sheet and said laminate are moved together on said supporting surface in two directions that are mutually perpendicularly to each other.
Claim 6
Dependent Claim
41 words
The method according to claim 2, wherein said air-impermeable sheet and said laminate are moved together with said suction pipe in a direction perpendicular to a longitudinal direction of said suction pipe extending along the one side surface of said laminate.
Claim 7
Dependent Claim
30 words
The method according to claim 2, wherein said air-impermeable sheet and said laminate are moved together on said supporting surface in two directions that are mutually perpendicular to each other.
Claim 8
Independent Claim
154 words
A method of vacuum compressing a laminate including a plurality of air-permeable sheets of a material, the method comprising the steps of: (a) covering a major portion of the periphery of the laminate, inclusive of a lower surface thereof, with an air-impermeable sheet on a supporting surface; (b) disposing a suction port of a suction device along at least one side surface of said laminate and arranged so as to draw a suction on said laminate; (c) compressing said laminate by evacuating air from a space defined by said air-impermeable sheet by drawing a vacuum through said suction port; (d) moving said air-impermeable sheet and said laminate together with said section pipe on said supporting surface; (e) stopping said air-impermeable sheet and said laminate together with said suction pipe on said supporting surface in a state where the air is evacuated from within said space; and (f) performing a further operation on said laminate.
Claim 9
Independent Claim
154 words
A method of vacuum compressing a laminate including a plurality of air-permeable sheets of a material, the method comprising the steps of: (a) covering a major portion of the periphery of the laminate, inclusive of a lower surface thereof, with an air-impermeable sheet on a supporting surface; (b) disposing a suction port of a suction device along at least one side surface of said laminate and arranged so as to draw a suction on said laminate; (c) compressing said laminate by evacuating air from a space defined by said air-impermeable sheet by drawing a vacuum through said suction port; (d) moving said air-impermeable sheet and said laminate together with said section pipe on said supporting surface; (e) stopping said air-impermeable sheet and said laminate together with said suction pipe on said supporting surface in a state where the air is evacuated from within said space; and (f) performing a further operation on said laminate.
Claim 10
Dependent Claim
13 words
The method of claim 7, wherein said further operation comprises a cutting operation.
Claim 11
Dependent Claim
40 words
The method according to claim 7, wherein said air-impermeable sheet and said laminate are moved together with said suction pipe in a direction perpendicular to a longitudinal direction of said suction pipe extending along one side surface of said laminate.
Claim 12
Dependent Claim
31 words
The method according to claim 7, wherein said air-impermeable sheet is a laminate removed together on said supporting surface in two directions which are mutually perpendicular with respect to each other.
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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) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |