UST896017I4 - Defensive publication - Google Patents
Defensive publication Download PDFInfo
- Publication number
- UST896017I4 UST896017I4 US896017DH UST896017I4 US T896017 I4 UST896017 I4 US T896017I4 US 896017D H US896017D H US 896017DH US T896017 I4 UST896017 I4 US T896017I4
- Authority
- US
- United States
- Prior art keywords
- foam
- temperature
- laminar
- heating
- order transition
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/42—Heating or cooling
- B29C51/426—Producing specific thermal regimes during thermoforming to obtain particular properties
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
Definitions
- thermoforming film/foam/ film laminar structures by heating the laminar structure, forming it with at least one mold, heating the resulting formed structure to at least the second order transition temperature of the foam and less than the temperature at which the foam undergoes cellular collapse, and restraining the expansion of the laminar structure while maintaining the outer walls thereof at a temperature at least 10 Centigrade degrees below the second order transition temperature of the foam.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
PROCESS FOR THERMOFORMING FILM/FOAM/FILM LAMINAR STRUCTURES BY HEATING THE LAMINAR STRUCTURE, FORMING IT WITH AT LEAST ONE MOLD, HEATING THE RESULTING FORMED STRUCTURE TO AT LEAST THE SECOND ORDER TRANSITION TEMPERATURE OF THE FOAM AND LESS THAN THE TEMPERATURE AT WHICH THE FOAM UNDERGOES CELLULAR COLLAPSE, AND RESTRAINING THE EXPANSION OF THE LAMINAR STRUCTURE WHILE MAINTAINING THE OUTER WALLS THEREOF AT A TEMPERATURE AT LEAST 10 CENTIGRADE DEGREES BELOW THE SECOND ORDER TRANSITION TEMPERATURE OF THE FOAM.
Description
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 Oiiice makes no assertion as to the novelty of the disclosed subject matter.
PUBLISHED MARCH 7, 1972 T896,017 THERMOFORMING LAMINAR FOAM STRUCTURES Leon Edward Wolinski, Buffalo, N.Y., assignor to E. I. du Pout de Nemours and Company, Wilmington, Del. Continuation of abandoned application Ser. No. 861,478, Sept. 26, 1969. This application Jan. 28, 1971, Ser.
lint. Cl. B2911 27/00 U.S. Cl. 264-321 No Drawing. 8 Pages Specification Process for thermoforming film/foam/ film laminar structures by heating the laminar structure, forming it with at least one mold, heating the resulting formed structure to at least the second order transition temperature of the foam and less than the temperature at which the foam undergoes cellular collapse, and restraining the expansion of the laminar structure while maintaining the outer walls thereof at a temperature at least 10 Centigrade degrees below the second order transition temperature of the foam.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11076971A | 1971-01-28 | 1971-01-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| UST896017I4 true UST896017I4 (en) | 1972-03-07 |
Family
ID=22334835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US896017D Pending UST896017I4 (en) | 1971-01-28 | 1971-01-28 | Defensive publication |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | UST896017I4 (en) |
-
1971
- 1971-01-28 US US896017D patent/UST896017I4/en active Pending
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