Global patent index - EP 1028838 A1

EP 1028838 A1 2000-08-23 - METHOD FOR PRODUCING MULTI-LAYERED PREFORMS

Title (en)

METHOD FOR PRODUCING MULTI-LAYERED PREFORMS

Title (de)

VERFAHREN ZUR HERSTELLUNG VON MEHRSCHICHTIGEN VORFORMLINGEN

Title (fr)

PROCEDE DE PRODUCTION DE PARAISONS MULTICOUCHE

Publication

EP 1028838 A1 (DE)

Application

EP 98951147 A

Priority

  • CH 9800471 W
  • CH 254097 A

Abstract (en)

[origin: WO9922926A1] The inventive method for producing multilayered preforms makes it possible to create extremely thin layers, especially a thin surface layer and/or a thin barrier layer. These thin layers are at the most 35 % and 5 % respectively of the overall volume. They are produced using a multi-component injection moulding form tool which is operated in such a way that the plastic component provided for creating the thin layers is conveyed through the innermost jet chamber. Said plastic component has a slightly higher temperature and is therefore slightly viscous. Preforms produced in this way are characterised by a surface layer representing less than 35 vol. % or a barrier layer representing approx. 5 vol. %.

IPC 1-7 (main, further and additional classification)

B29C 45/16

IPC 8 full level (invention and additional information)

B29C 45/16 (2006.01)

CPC (invention and additional information)

B29C 45/1646 (2013.01); B29C 45/1603 (2013.01); B29C 45/1643 (2013.01); B29B 2911/1406 (2013.01); B29B 2911/14066 (2013.01); B29B 2911/1408 (2013.01); B29B 2911/14093 (2013.01); B29B 2911/1412 (2013.01); B29B 2911/14126 (2013.01); B29B 2911/14146 (2013.01); B29B 2911/14646 (2013.01); B29B 2911/1498 (2013.01); B29C 2045/1648 (2013.01); B29C 2045/1656 (2013.01); B29C 2045/2872 (2013.01); B29K 2105/253 (2013.01)

Citation (search report)

See references of WO 9922926A1

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB IT LI LU NL

EPO simple patent family

WO 9922926 A1 19990514; CA 2303766 A1 19990514; CH 692573 A5 20020815; EP 1028838 A1 20000823; JP 2001521837 A 20011113

INPADOC legal status

2005-12-07 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20050601

2002-07-24 [17Q] FIRST EXAMINATION REPORT

- Ref Legal Event Code: 17Q

- Effective date: 20020610

2000-08-23 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000422

2000-08-23 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): AT BE CH DE DK ES FR GB IT LI LU NL