Patent US4725393A successfully refreshed from Google Patents.
US4725393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for vacuum compression of laminated sheet material
Assignee: Kawakami Seisakusho KK
•
Filing: 1986-09-30
•
Granted: 1988-02-16
•
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 16:02
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.
References Cited (Backward Citations)
US2331296A
Cited
US3072225A
Cited
US3765289A
Cited
JPS5215831A
Cited
US4205835A
Cited
US4277890A
Cited
US4494433A
Cited
US4425406A
Cited
US4543862A
Cited
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 |