GB1227208A - - Google Patents
Info
- Publication number
- GB1227208A GB1227208A GB1227208DA GB1227208A GB 1227208 A GB1227208 A GB 1227208A GB 1227208D A GB1227208D A GB 1227208DA GB 1227208 A GB1227208 A GB 1227208A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layer
- mould
- copolymers
- sandal
- sole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B3/00—Footwear characterised by the shape or the use
- A43B3/10—Low shoes, e.g. comprising only a front strap; Slippers
- A43B3/101—Slippers, e.g. flip-flops or thong sandals
- A43B3/102—Slippers, e.g. flip-flops or thong sandals leaving the heel of the foot bare
Landscapes
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
1,227,208. Injection moulding footwear. T. FUKUOKA. 29 Nov., 1968, No. 56723/68. Heading B5A. [Also in Division A3] A sandal consists of a band member 1 and a sole member 2 which are integrally and simultaneously moulded from thermoplastic resin in such a way as to form a solid outer layer 4 and a foamed interior 3. The upper surface 2A of the sole 2 is shaped to conform to the wearer's foot and the upper and/or lower surface of the sole 2 is covered with a layer 5 of hard thermoplastic material. The cover layer 5 is preformed from a layer 5<SP>1</SP> which is held by holders 10 (Fig. 3) beneath heaters 7 and is then moved downwardly into contact with a vacuum forming mould 8. The edges a of the sheet are then cut off and the layer 5 is then placed in the mould used to form the sandal. Thermoplastic material together with a blowing agent is then injected into the mould at a temperature sufficient to render the material fluid and above the foaming temperature but at a pressure sufficient to restrain foaming. When the material contacts the cooled mould surface it forms the solid outer layer 4 and the mould cavity is then enlarged so that the uncooled central mass foams to form the foamed interior 3. Suitable materials for the sandal are polystyrene; polymers and copolymers of a-methyl styrene, ar-methyl styrene or vinyltoluene, mono- and di-chlorostyrene; copolymers of vinylidene chloride; polymers and copolymers of methyl methacrylate, ethyl acrylate and other derivatives of acrylic acid; polymers and copolymers of vinyl acetate and vinyl butyral; and cellulose derivatives such as cellulose nitrate or acetate. Suitable blowing agents are dichlorodifluoromethane, carbon dioxide, pentane and other low boiling hydrocarbons or heat sensitive gas generating agents. In a modification (not shown) a lower sole member having an integral band and hard cover layer on the tread surface is combined with an upper sole member having a hard cover layer on its upper surface to form the completed sandal.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5672368 | 1968-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1227208A true GB1227208A (en) | 1971-04-07 |
Family
ID=10477373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1227208D Expired GB1227208A (en) | 1968-11-29 | 1968-11-29 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1227208A (en) |
-
1968
- 1968-11-29 GB GB1227208D patent/GB1227208A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |