GB1229862A - - Google Patents
Info
- Publication number
- GB1229862A GB1229862A GB1229862DA GB1229862A GB 1229862 A GB1229862 A GB 1229862A GB 1229862D A GB1229862D A GB 1229862DA GB 1229862 A GB1229862 A GB 1229862A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- paper
- covering
- coverings
- rollers
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
- B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
- B29C44/322—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables
- B29C44/324—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables the preformed parts being tubular or folded to a tubular shape
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
1,229,862. Moulding pipes &c. of foamed plastics. COOLAG Ltd. 5 March, 1969 [5 March, 1968], No. 10516/68. Heading B5A. [Also in Division F2] In a continuous process for producing a foamed plastics tube a foamable plastics material is fed from a nozzle 18 into the annular space provided in a forming device comprising a cylindrical core 13 and a tube 11, and allowed to expand and set, and the formed tube is withdrawn by rollers 19, 20. The core is continuously covered with paper tube 15 by means 14 which also supplies a ribbon of paper 16 to the internal surface of the tube 11; the plastics tube is thus formed between the two coverings which are eventually removed. The edges 17a, 17b of the outer paper covering are brought together by a lipped slit 12 in the wall of the tube 11. Instead of paper the coverings may be of a fabric impregnated with a release agent. Alternatively the inner covering may be of asbestos paper and the outer one of P.V.C., both coverings being coated with an adhesive to form part of the moulded tube. The edge portions of the outer covering are heat sealed, e.g. by rollers which may replace the rollers 19, 20. Instead of a paper &c. covering on the core 13 it may be coated with a release agent such as P.T.F.E. Part tubular units may be produced by appropriately shaped inner and outer forming members. As the moulded product passes from the device it may be coated internally and / or externally with a sealant.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1051668 | 1968-03-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1229862A true GB1229862A (en) | 1971-04-28 |
Family
ID=9969273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1229862D Expired GB1229862A (en) | 1968-03-05 | 1968-03-05 |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1229862A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984002384A1 (en) * | 1982-12-07 | 1984-06-21 | Viuff Carl Johan Kofod Finnema | An insulated pipe for gaseous media and a method of manufacturing said pipe |
-
1968
- 1968-03-05 GB GB1229862D patent/GB1229862A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984002384A1 (en) * | 1982-12-07 | 1984-06-21 | Viuff Carl Johan Kofod Finnema | An insulated pipe for gaseous media and a method of manufacturing said pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |