UST881004I4 - Defensive publication - Google Patents
Defensive publication Download PDFInfo
- Publication number
- UST881004I4 UST881004I4 US881004DH UST881004I4 US T881004 I4 UST881004 I4 US T881004I4 US 881004D H US881004D H US 881004DH US T881004 I4 UST881004 I4 US T881004I4
- Authority
- US
- United States
- Prior art keywords
- defensive publication
- hollow body
- thermoplastic
- defensive
- mold
- 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.)
- Pending
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
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
Definitions
- a process for producing a reinforced foamed thermoplastic structure from a foamable thermoplastic composition consisting of a thermoplastic material such as polymers and copolymers of propylene, 4-methyl pentene, polyvinyl chloride and various nylons and a blowing agent which yields a gas on heating, such as the volatile liquids of hydrocarbons and halogenated hydrocarbons as pentene and methyl chloride respectively, or solid materials which decompose on heating such as sulphohydrazines and N-nitroso compounds is disclosed.
- the foamable thermoplastic composition is placed in a mold through which extends at least one hollow body, heat is applied through the hollow body supplied by a heated fluid at or above the activation temperature for the blowing agent thereby foaming the thermoplastic material so that it envelopes the part of the hollow body or bodies within the mold. Heat may also be applied externally to the structure by means of the mold surface concurrently with the heat supplied through the hollow body.
- the process is especially useful for the production of rigid thermoplastic pallets for fork lift trucks.
Landscapes
- Pallets (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Description
DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 O.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.
Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Ofiice makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED DECEMBER 1, 1970 T881,004 REINFORCED FOAMED THERMOPLASTIC MATERIALS William Bruce Ian Small, Welwyn Garden City, England,
assignor to Imperial Chemical Industries Limited, Millbank, London, England, a corporation of Great Britain Filed Apr. 27, 1970, Ser. No. 32,405 Claims priority, application Great Britain, May 2, 1969, 22,512/ 69 Int. Cl. B29d 27/08 U.S. Cl. 264-51 No Drawing. 7 Pages Specification A process for producing a reinforced foamed thermoplastic structure from a foamable thermoplastic composition consisting of a thermoplastic material such as polymers and copolymers of propylene, 4-methyl pentene, polyvinyl chloride and various nylons and a blowing agent which yields a gas on heating, such as the volatile liquids of hydrocarbons and halogenated hydrocarbons as pentene and methyl chloride respectively, or solid materials which decompose on heating such as sulphohydrazines and N-nitroso compounds is disclosed. The foamable thermoplastic composition is placed in a mold through which extends at least one hollow body, heat is applied through the hollow body supplied by a heated fluid at or above the activation temperature for the blowing agent thereby foaming the thermoplastic material so that it envelopes the part of the hollow body or bodies within the mold. Heat may also be applied externally to the structure by means of the mold surface concurrently with the heat supplied through the hollow body. The process is especially useful for the production of rigid thermoplastic pallets for fork lift trucks.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB22512/69A GB1260946A (en) | 1969-05-02 | 1969-05-02 | Reinforced foamed thermoplastic articles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST881004I4 true UST881004I4 (en) | 1970-12-01 |
Family
ID=10180581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US881004D Pending UST881004I4 (en) | 1969-05-02 | 1970-04-27 | Defensive publication |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | UST881004I4 (en) |
| DE (1) | DE2021423A1 (en) |
| GB (1) | GB1260946A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT7919298A0 (en) * | 1979-01-15 | 1979-01-15 | Bayer Italia Spa | FORMING OF HONEYCOMB SHEETS OF THERMOPLASTIC RESINS COUPLED WITH THERMOFORMABLE CROSS-LINKED POLYETHYLENE FOAM. |
-
1969
- 1969-05-02 GB GB22512/69A patent/GB1260946A/en not_active Expired
-
1970
- 1970-04-27 US US881004D patent/UST881004I4/en active Pending
- 1970-04-30 DE DE19702021423 patent/DE2021423A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE2021423A1 (en) | 1970-11-12 |
| GB1260946A (en) | 1972-01-19 |
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