Patent JPS5368581A successfully refreshed from Google Patents.
Patent CA638227A successfully refreshed from Google Patents.
Patent US5472660A successfully refreshed from Google Patents.
US5472660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of shaped products of biaxially oriented polymeric material
Assignee: Fortex Inc
•
Filing: 1994-08-23
•
Granted: 1995-12-05
•
Expires: 2014-08-23
Abstract
Abstract Methods for the formation of biaxially oriented thermoplastic articles having flat surfaces or sharp contours, along with the articles themselves. Such methods relate to blow forming a sheet of unoriented thermoplastic material to form biaxially oriented shaped intermediates, followed by the heat-shrinking of the biaxially oriented intermediates onto a male form to produce articles of exacting dimensions and flat surfaces or sharply defined contours. Such thermoplastic articles include autoclavable, hot fillable, heat stable, transparent PET containers.
Inventors
- 👤 John K. Fortin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:03
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/08; B29C51/082; B29C49/00; B29C51/04; B29C51/06; B29C51/26; B29C51/30; B29C51/306; B29C55/00; B29C55/22; B29C55/26; B29C61/00; B29C61/02; B29C61/025; B29C61/06; B29D; B29D22/00; B29D22/003; B29C2791/00; B29C2791/004; B29C2791/006; B29C2791/007; B29K; B29K2067/00; B29K2995/00; B29K2995/0018; B29K2995/0026; B29K2995/0029; B29K2995/0037; B29K2995/005; B29K2995/0053; B29L; B29L2031/00; B29L2031/712; Y; Y10; Y10S; Y10S264/00; Y10S264/907; Y10S264/909
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
133 words
A method for producing a biaxially oriented, thermoplastic, container shaped article having a depth of draw of less than about 1.0 comprised of: forming a biaxially oriented container shaped intermediate, comprised of side walls and bottom, by blow forming a sheet of thermoplastic material that is maintained at or near its orientation temperature into a forming tube, wherein said forming tube contains means for uniformly preventing the portion of said side wall of said intermediate adjacent to the mouth of said forming tube from becoming biaxially oriented; placing said intermediate on a male form of a predetermined size, shape and texture; heating said intermediate above the orientation temperature of said thermoplastic material to heat-shrink said intermediate onto the surface of said form to create said article; and removing said article from said form.
Claim 2
Independent Claim
133 words
A method for producing a biaxially oriented, thermoplastic, container shaped article having a depth of draw of less than about 1.0 comprised of: forming a biaxially oriented container shaped intermediate, comprised of side walls and bottom, by blow forming a sheet of thermoplastic material that is maintained at or near its orientation temperature into a forming tube, wherein said forming tube contains means for uniformly preventing the portion of said side wall of said intermediate adjacent to the mouth of said forming tube from becoming biaxially oriented; placing said intermediate on a male form of a predetermined size, shape and texture; heating said intermediate above the orientation temperature of said thermoplastic material to heat-shrink said intermediate onto the surface of said form to create said article; and removing said article from said form.
Claim 3
Independent Claim
161 words
A method for blow forming a sheet of unoriented thermoplastic material to form a biaxially oriented shaped article comprising: clamping said sheet of material over the mouth of a forming tube; heating said material to about its orientation temperature; applying a fluid pressure to the face of said sheet in order to cause said sheet to enter into and substantially conform to the interior shape of said forming tube, without plug assist, to create said biaxially oriented article, wherein the depth of draw of said container shaped article is sufficient for full orientation of the sidewalls; and preventing the material entering into and conforming to the shape of the said forming tube from sticking to the walls of said forming tube, so as to permit the biaxial orientation to occur, by carrying out the fluid pressure application step in the presence of air pressure introduced into said forming tube between the forming article and the interior wall of said forming tube.
Claim 4
Independent Claim
161 words
A method for blow forming a sheet of unoriented thermoplastic material to form a biaxially oriented shaped article comprising: clamping said sheet of material over the mouth of a forming tube; heating said material to about its orientation temperature; applying a fluid pressure to the face of said sheet in order to cause said sheet to enter into and substantially conform to the interior shape of said forming tube, without plug assist, to create said biaxially oriented article, wherein the depth of draw of said container shaped article is sufficient for full orientation of the sidewalls; and preventing the material entering into and conforming to the shape of the said forming tube from sticking to the walls of said forming tube, so as to permit the biaxial orientation to occur, by carrying out the fluid pressure application step in the presence of air pressure introduced into said forming tube between the forming article and the interior wall of said forming tube.
Claim 5
Dependent Claim
67 words
The method of claim 2 wherein said container-shaped article is an intermediate shape to the final shape desired and said method is further comprised of: placing said intermediate shape on a male form of predetermined size, shape, and texture; heating said intermediate shape to shrink it onto the surface of said male form to create said final shape of said article; and removing it from said form.
Claim 6
Dependent Claim
35 words
The method of claim 3 wherein said intermediate has a crystallizable rim portion from said sheet and said method is further comprised of: heating said rim to crystallize it, thereby making said rim heat stable.
Claim 7
Dependent Claim
11 words
The method of claim 3 wherein said male form is heated.
Claim 8
Dependent Claim
13 words
The method of claim 2 wherein the thermoplastic material is a crystallizable polymer.
References Cited (Backward Citations)
US1531504A
Cited
GB474001A
Cited
US2823421A
Cited
US2784456A
Cited
US2990581A
Cited
US2973558A
Cited
US3244780A
Cited
US3182355A
Cited
GB991830A
Cited
GB1136613A
Cited
US3412188A
Cited
US3439380A
Cited
US3757718A
Cited
US3499188A
Cited
US3546746A
Cited
US3532786A
Cited
US3606958A
Cited
US3662049A
Cited
US3642415A
Cited
US3739052A
Cited
US3687594A
Cited
US3746497A
Cited
US3859028A
Cited
JPS4928027A
Cited
US3995763A
Cited
US4005967A
Cited
US4264558A
Cited
US4108937A
Cited
US4025594A
Cited
US4116606A
Cited
US4045530A
Cited
US4177239A
Cited
US4379099A
Cited
US5261545A
Cited
US4590021A
Cited
US4572811A
Cited
US4375442A
Cited
US4233022A
Cited
US4406854A
Cited
US4380526A
Cited
US4330579A
Cited
US4260567A
Cited
US4381279A
Cited
US4315725A
Cited
US4311660A
Cited
US4293520A
Cited
US4298331A
Cited
JPS56164817A
Cited
US4358492A
Cited
US4524045A
Cited
US4469270A
Cited
US4476084A
Cited
US4589559A
Cited
US4405456A
Cited
US4388356A
Cited
US4420454A
Cited
JPS5978824A
Cited
US4697718A
Cited
US4587075A
Cited
US4563325A
Cited
US5248533A
Cited
EP0155763A2
Cited
US5283029A
Cited
US4582665A
Cited
US4711624A
Cited
US4836971A
Cited
JPS62284723A
Cited
JPS62284724A
Cited
US4943406A
Cited
US4810457A
Cited
US4933135A
Cited
US4878826A
Cited
US4927680A
Cited
US5260005A
Cited
US5145632A
Cited
US5229042A
Cited
US5178816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-12-04 | 1999-06-05 | 1999-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-04 | 2003-06-05 | 2003-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-04 | 2007-06-05 | 2007-12-05 | $7700.00 | Window Closed / Lapsed |