Shrink bag with non-shrink header

• US 20020166787A1
• Filed: 05/09/2001
• Published: 11/14/2002
• Est. Priority Date: 05/09/2001
• Status: Abandoned Application

• Current Assignee: Robbie Manufacturing, Inc. (Transcontinental Incorporated)
• Original Assignee: Robbie Manufacturing, Inc. (Transcontinental Incorporated)
• Inventors: Linton, Jeffrey Alan
• Application Number:
  US09/851,786
• Publication Number:
  US 20020166787A1
• Time in Patent Office: Days
• US Class Current: 206/497
• CPC Class Codes: B65D 33/14 Suspension means handles B65D33/06
• CPC Class Codes: B65D 75/002 in shrink films B65D71/08 takes precedence

Abstract

A heat shrinkable bag having a non-shrink header for containing a product. The bag includes first and second side walls formed from heat shrinkable material joined together to form a body portion having an opening for access into an interior chamber having an inner surface to receive and contain the product. A header is attached to the inner surface of the body portion and extends outwardly from the opening in the body portion. The header is substantially formed from non-shrinkable film material that prevents distortion of the header during manufacture of the bag.

Claims

1. A heat shrinkable bag for containing a product comprising:

first and second side walls formed from heat shrinkable material and joined together to form a body portion having an opening for access into an interior chamber having an inner surface to receive and contain the product; and

a header attached to the body portion that extends outwardly from the opening in the body portion, wherein the header is substantially formed from non-shrinkable film material that prevents distortion of the header during manufacture of the bag.

2. The heat shrinkable bag of claim 1 wherein the header is attached to the inner surface of the interior chamber and wherein a portion of the header extends down into the interior chamber of the body portion.

3. The heat shrinkable bag of claim 2 wherein the header is attached to the inner surface of the body portion using a thin longitudinal heat seal.

4. The heat shrinkable bag of claim 1 wherein the first and second side walls are formed from a single sheet of heat shrinkable polyolefin film that is folded over upon itself to form a fold at one end and in which edges of the first and second side walls are heat sealed to each other to form the body portion.

5. The heat shrinkable bag of claim 1 wherein the heat shrinkable material used to form the body portion is formed from biaxially oriented shrink polyolefins.

6. The heat shrinkable bag of claim 1 wherein the header is formed from a non-shrinkable polyethylene.

7. The heat shrinkable bag of claim 1 wherein the header has a thickness of between 1.25 and 3.0 mils.

8. The heat shrinkable bag of claim 1 wherein the header includes wicket holes.

9. The heat shrinkable bag of claim 1 wherein the heat shrinkable material of the side walls and the non-shrinkable film material have slip characteristics that promote a non-blocking interface between the header and the side walls, thereby promoting ease of separation between the header and the side walls when opening the bag for product insertion.

10. The heat shrinkable bag of claim 1 wherein the header further comprises a slit path and is made from a material that when slit, will only propagate a tear along the slit path.

11. A heat shrinkable bag for containing a product comprising:

first and second side walls formed from a single sheet of heat shrinkable polyolefin film that is folded over upon itself to form a fold at one end and in which edges of the first and second side walls are heat sealed to each other to form a body portion having an opening for access into an interior chamber having an inner surface to receive and contain the product; and

a header attached to the inner surface of the body portion along a thin longitudinal heat seal that extends outwardly from the opening in the body portion, wherein the header is substantially formed from non-shrink material that prevents distortion of the header during manufacture of the bag.

12. The heat shrinkable bag of claim 11 wherein the heat shrinkable material used to form the body portion is biaxially oriented shrink polyolefins .

13. The heat shrinkable bag of claim 11 wherein the header is formed from polyethylenes.

14. The heat shrinkable bag of claim 11 wherein the header has a thickness of between 1.25 and 3.0 mils.

15. The heat shrinkable bag of claim 11 wherein the header includes wicket holes.

16. A method for producing a heat shrinkable bag for containing a product comprising the steps of:

folding a single sheet of heat shrinkable polyolefin film over upon itself to form first and second side walls, wherein the second side wall has a lip extending above the top edge of the first side wall;

attaching a header to the lip along a thin longitudinal heat seal such that the header extends outwardly from the side walls, wherein the header is substantially formed from non-shrink material that prevents distortion of the header during manufacture of the bag; and

applying heat and pressure to seal two edges of the side walls to form a body portion having an opening for access into an interior chamber to receive and contain the product.