EP0371810A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Window for automobiles or the like, and method of manufacturing the same
Assignee: Hashimoto Forming Industry Co Ltd
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Filing: 1989-11-30
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Granted: —
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Expires: 2009-11-30
Abstract
Abstract A window (1) for automobiles or the like includes a window plate (2) and an integral frame member (3) along at least one edge of the window plate. The window (1) is manufactured by preparing a window plate (2) and a pre-shaped frame body (3) which comprises a main portion (5) and a surface layer (6) covering an outer side of the main portion. The main portion (5) of the pre-shaped frame body (3) is composed of a thermoplastic synthetic resin material having a relatively high dielectric loss and containing a heat foamable agent therein. The surface layer (6) is composed of a non-foamable thermoplastic synthetic resin material. The pre-shaped frame body (3) is subjected to a dielectric heating in a mold, to cause the foamable agent in the main portion of the pre-shaped frame body to expand in the mold cavity. The resultant frame member (3) of the window comprises a main portion (5) composed essentially of a foamed thermoplastic synthetic resin material, which is covered on its outer side by a surface layer (6) composed essentially of a non-foamed thermoplastic synthetic resin material.
Inventors
- 👤 Toshiyuki Mozawa
- 👤 Tatsuya Tamura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 17:32
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/34; B29C44/3484; B29C35/00; B29C35/02; B29C35/12; B29C44/02; B29C44/12; B29C44/1271; B29C70/00; B29C70/68; B29C70/74; B29C70/76; B29C70/763; B32; B32B; B32B17/00; B32B17/06; B32B17/10; B32B17/10005; B32B17/10009; B32B17/10036; B32B17/10165; B32B17/10293; B60; B60J; B60J1/00; B60J1/02; B60J10/00; B60J10/15; B60J10/16; B60J10/20; B60J10/21; B60J10/26; B60J10/265; B60J10/70; B29K; B29K2105/00; B29K2105/04
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
68 words
A window for an automobile or the like, including a window plate and a frame member formed into a predetermined shape so as to be integral with the window plate along at least one edge thereof, wherein said frame member comprises a main portion comprising a foamed thermoplastic synthetic resin material and covered on its outer side by a surface layer comprising a non-foamed thermoplastic synthetic resin material.
Claim 2
Dependent Claim
68 words
A window for an automobile or the like, including a window plate and a frame member formed into a predetermined shape so as to be integral with the window plate along at least one edge thereof, wherein said frame member comprises a main portion comprising a foamed thermoplastic synthetic resin material and covered on its outer side by a surface layer comprising a non-foamed thermoplastic synthetic resin material.
Claim 3
Dependent Claim
17 words
The window as claimed in Claim 1, wherein said frame member is composed essentially of polyvinyl-chloride resin.
Claim 4
Dependent Claim
24 words
The window as claimed in Claim 1 or 2, wherein said non-foamed thermoplastic synthetic resin material forming the surface layer is a transparent resin.
Claim 5
Dependent Claim
24 words
The window as claimed in Claim 1 or 2, wherein said non-foamed thermoplastic synthetic resin material forming the surface layer is a semi-transparent resin.
Claim 6
Dependent Claim
36 words
The window as claimed in Claim 1 or 2, wherein said surface layer is of a first main color, and has a local surface portion of a second color which is different from said first color.
Claim 7
Dependent Claim
29 words
The window as claimed in any one of Claims 1 to 5, wherein said surface layer is provided with a longitudinally continuous ornamental portion which is visible from outside.
Claim 8
Dependent Claim
23 words
The window as claimed in Claim 6, wherein said ornamental portion is composed of a strip integrally adhered to said non-foamed surface layer.
Claim 9
Dependent Claim
38 words
The window as claimed in Claim 6, wherein said ornamental portion is composed of thermoplastic synthetic resin material which has been coextruded with the thermoplastic synthetic resin material of said surface layer and is different in color therefrom.
Claim 10
Dependent Claim
40 words
The window as claimed in Claim 6, wherein said ornamental portion has longitudinal edges embedded in the thermoplastic synthetic resin material of said surface layer such that remaining region of the ornamental portion is exposed as being visible from outside.
Claim 11
Dependent Claim
31 words
The window as claimed in Claim 9, wherein said remaining region of the ornamental portion exposed as being visible from outside has a width which varies in the longitudinal direction thereof.
Claim 12
Independent Claim
247 words
A method of manufacturing windows for an automobile or the like, each including a window plate and a frame member comprising a thermoplastic synthetic resin material formed into a predetermined shape so as to be integral with the window plate along at least one edge thereof, said frame member comprising a foamed main portion covered by a non-foamed surface layer on its outer side, wherein the method comprises the steps of: (A) preparing a window plate of a desired shape; (B) forming a pre-shaped frame body including a main portion composed of a thermoplastic synthetic resin material having a relatively high dielectric loss and containing a heat foamable agent therein, and a surface layer covering an outer side of the main portion and composed of a non-foamable thermoplastic synthetic resin material, while maintaining said foamable agent in the main portion in a substantially unfoamed state; (C) temporarily securing the pre-shaped frame body onto and along the edge of the window plate; (D) placing the pre-shaped frame body in a cavity of a mold composed at least partly of a material having a relatively low dielectric loss, together with at least that region of the window plate which is adjacent to the pre-shaped frame body; and (E) subsequently applying a high frequency voltage to that region of the mold which corresponds to the pre-shaped frame body, to heat the pre-shaped frame body and cause the foamable agent in the main portion to evaporate and expand within the cavity.
Claim 13
Independent Claim
247 words
A method of manufacturing windows for an automobile or the like, each including a window plate and a frame member comprising a thermoplastic synthetic resin material formed into a predetermined shape so as to be integral with the window plate along at least one edge thereof, said frame member comprising a foamed main portion covered by a non-foamed surface layer on its outer side, wherein the method comprises the steps of: (A) preparing a window plate of a desired shape; (B) forming a pre-shaped frame body including a main portion composed of a thermoplastic synthetic resin material having a relatively high dielectric loss and containing a heat foamable agent therein, and a surface layer covering an outer side of the main portion and composed of a non-foamable thermoplastic synthetic resin material, while maintaining said foamable agent in the main portion in a substantially unfoamed state; (C) temporarily securing the pre-shaped frame body onto and along the edge of the window plate; (D) placing the pre-shaped frame body in a cavity of a mold composed at least partly of a material having a relatively low dielectric loss, together with at least that region of the window plate which is adjacent to the pre-shaped frame body; and (E) subsequently applying a high frequency voltage to that region of the mold which corresponds to the pre-shaped frame body, to heat the pre-shaped frame body and cause the foamable agent in the main portion to evaporate and expand within the cavity.
Claim 14
Dependent Claim
33 words
The method as claimed in Claim 11, wherein said pre-shaped frame body is temporarily secured onto and along the edge of the window plate, with a heat activation type adhesive material layer therebetween.
Claim 15
Dependent Claim
26 words
The method as claimed in Claim 12, wherein said heat-activation type adhesive material layer is provided on said pre-shaped frame body, during or after formation thereof.
Claim 16
Dependent Claim
20 words
The method as claimed in Claim 12, wherein said heat-activation type adhesive material layer is provided on said window plate.
Claim 17
Dependent Claim
25 words
The method as claimed in Claim 11, 12, 13 or 14 wherein said synthetic resin material forming said continuous body comprises a soft polyvinylchloride resin.
Claim 18
Independent Claim
24 words
The method as claimed in any one of Claims 11 to 15, wherein said pre-shaped frame body is formed by an extrusion molding process.
Claim 19
Dependent Claim
54 words
A window according to any one of claims 1 to 10 or a method as claimed in any one of Claims 11 to 16, wherein said window plate is of a laminated structure comprising, an intermediate film composed of a transparent and adhesive thermoplastic synthetic resin material arranged between a pair of transparent sheets.
Claim 20
Dependent Claim
60 words
A window according to any one of claims 1 to 10 or 17 or a method as claimed in any one of Claims 11 to 17, wherein said pre-shaped frame body is provided with a connection layer to be arranged between the window plate and the frame member, which is composed of a hard or semi-hard type synthetic resin material.
Claim 21
Dependent Claim
105 words
A window according to any one of claims 1 to 10, or a method according to any one of claims 11 to 16, wherein said window plate has a laminated structure, which comprises an intermediate film composed of a transparent and adhesive thermoplastic synthetic resin material arranged between a pair of transparent sheets, and wherein said pre-shaped frame body is provided with a connection layer to be arranged between the window plate and the frame member, which is composed of a hard or semi-hard type synthetic resin material and which is adapted to form a fusion-bonded region with the intermediate film of the window plate.
Claim 22
Independent Claim
37 words
The method as claimed in any one of Claims 11 to 19, wherein said pre-shaped frame body is placed in the cavity of the mold with its surface layer directed vertically downwardly below the main portion thereof.
References Cited (Backward Citations)
No citation records indexed.
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