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US 5,087,235 AGranted
Method for making a collapsible bag with spout
AssigneeCustom Packaging Systems, Inc.
InventorLee Lafleur
Life of this patent
Estimating the term…
Abstract
A generally cubical collapsible bag with six generally rectangular walls of a flexible plastic material. A spout with an enclosed end is attached to the bag by a continuous heat seal. The spout communicates with the interior of the bag through an opening encircled by the heat seal. Preferably the spout is attached to the inside of the bag and passes through the opening and extends exteriorly of the bag.
Claims12
A method of forming a collapsible bag having a spout comprising:
- (a) forming a collapsible bag with a continuous peripheral wall from a blank of a flexible and collapsible plastic film;
- (b) forming a separate flexible and collapsible spout from a flexible and collapsible plastic film with a continuous peripheral wall, an enclosed end and an open end;
- (c) positioning the closed end of the spout on the blank;
- (d) attaching and sealing the closed end of the spout to the blank by forming a continuous heat sealed joint;
- and
- (e) after forming the heat sealed joint removing a portion of the blank of the bag and a portion of the end of the spout both encompassed by the heat sealed joint to provide a through opening encompassed by the heat sealed joint and communicating the spout with the interior of the bag.
3 more elements
Dependencies are inferred from the claim text.