Claims
- 1. A method of forming a blow molded plastic container comprising the steps of providing a preform having at least a body portion of a laminated wall construction including an outer layer, a gas barrier layer and at least one inner layer including an inner most layer, blow molding the preform in a blow mold to form said container having an exterior, and forming at least one vent opening in the exterior of the container with the vent opening extending through the outer layer and the barrier layer only and not extending through the inner most layer.
- 2. The method of claim 1 wherein said vent opening is formed in the exterior of the container while the container is in said blow mold.
- 3. The method of claim 2 wherein said vent opening is formed by a piercing pin.
- 4. The method of claim 1 wherein said vent opening is formed by a piercing pin.
- 5. The method of claim 1 wherein said vent opening is formed by a laser.
Parent Case Info
This is a division of application Ser. No. 07/270,840 filed Nov. 14, 1988.
US Referenced Citations (5)
Foreign Referenced Citations (4)
Number |
Date |
Country |
199633 |
Oct 1986 |
EPX |
2153503 |
May 1973 |
DEX |
2704225 |
Aug 1978 |
DEX |
3327419 |
Feb 1985 |
DEX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
270840 |
Nov 1988 |
|