Self-forming container

Patent metadata

Field	Value
Publication number	US-2016137374-A1
Application number	US-201314898270-A
Country	US
Kind code	A1
Filing date	Jun 20, 2013
Priority date	Jun 20, 2013
Publication date	May 19, 2016
Grant date	—

Abstract

A self-forming container having a continuous side wall with opposing top and bottom edges connected by an interior side wall surface, said side wall preferably having less than 10% shrink at 90° C., and more preferably being nonshrinkable; and a heat shrinkable connecting wall connected to at least first and second opposing portions of the sidewall and forming therewith a adapted for heat activated self-forming into a stand up con figuration having a stable base connected to and supporting said side wall.

First claim

What is claimed is:

1 . A self-forming container comprising:
a side wall having an interior side wall surface; and a connecting base wall comprising a heat shrinkable film; said connecting base wall connected to first and second opposing portions of said interior side wall surface thereby closing said side wall; whereby said container is adapted for heat activated self-forming into a stand up configuration having a stable base connected to and supporting said first and second opposing portions of said interior side wall surface.

2 . A self-forming container, as defined in claim 1 , wherein said heat shrinkable film has a machine direction shrink of at least 10% at 90° C.

3 . A self-forming container, as defined in claim 1 , wherein said heat shrinkable film has a machine direction shrink force of at least 50 g/mil at 90° C.

4 . A self-forming container, as defined in claim 1 , wherein each of said side walls has a machine direction modulus of elasticity of at least 1000 MPa at 23° C. and 50% relative humidity.

5 . A self-forming container, as defined in claim 1 , wherein said heat shrinkable film has at least 40% shrink and less than 10% shrink at 90° C. in at least one direction.

6 . A self-forming container, as defined in claim 1 , wherein:
said side wall has top and bottom edge portions; and
said connecting base wall is connected to said side wall proximate said side wall bottom edge portion.

7 . A self-forming container, as defined in claim 1 , wherein said connecting base wall is attached to said side wall with a single gusset.

8 . A self-forming container, as defined in claim 1 , wherein said connecting base wall is attached to said side wall with a plurality of gussets.

9 . A self-forming container, as defined in claim 1 , wherein said connecting base wall has at least 10% greater shrink at 90° C. than said side wall in the same direction.

10 . A self-forming container, as defined in claim 1 , wherein said heat shrinkable film has a machine direction shrink value of at least 30% at 90° C.

11 . A self-forming container, as defined in claim 1 , wherein said side wall is semi-rigid, rigid, or tensiff.

12 . A self-forming container, as defined in claim 1 , wherein:
said side wall has less than 10% shrink at 90° C.; and said connecting base wall has at least 10% greater shrink at 90° C. in at least one direction than the side wall in that same direction.

13 . A self-forming container, as defined in claim 1 , wherein:
said side wall is continuous having opposing top and bottom edges connected by said interior side wall surface, said side wall having less than 10% shrink at 90° C.; and said connecting base wall having at least 10% shrink at 90° C. in at least one direction.

14 . A self-forming container, as defined in claim 1 , wherein:
said side wall has a percentage shrink, at temperature T° C., of from 0 to “A” in at least one axial direction; and said connecting base wall has a percentage shrink, at said temperature T° C., of 10+“B” in at least one direction; where “T” is from 80 to 150° C., “A” is from 0 to 30, and “B”≧“A”.

15 . A self-forming container, as defined in claim 14 , wherein:
“T” is 90° C.

16 . A self-forming container, as defined in claim 14 , wherein:
“T” is 120° C.

17 . A self-forming container comprising:
a first side wall having a perimeter with opposing top and bottom edges connected by opposing first and second side edges; a second side wall opposite said first side wall, said second side-wall having a perimeter with opposing top and bottom edges connected by opposing first and second side edges; and a bottom wall comprising a heat shrinkable film;
wherein said first side edges of said first and second sidewalls are connected and said second side edges of said first and second sidewalls are connected to form a continuous inner side wall surface of said container and said bottom wall is connected to said first and second walls proximate their respective side wall bottom edges; and whereby said container is adapted for heat activated self-forming into a stand up configuration having a stable base connected to and supporting said first and second side walls.

18 . A self-forming container, as defined in claim 17 , wherein said first and second side walls have less than 5% shrink at 90° C. in both machine and transverse directions.

19 . A self-forming container, as defined in claim 17 , wherein said first and second side walls are semi-rigid, rigid, or tensiff.

20 . A container forming band comprising:
a shrink force strip disposed between a first nonshrink strip and a second nonshrink strip said first and second nonshrink strips and said shrink force strip sealed together at first and second opposing ends.

Assignees

• Bemis Co Inc

Inventors

• Brosch Mychal B
• Mussell Chris S
• Priscal Michael D
• O'Shea Riley P

Classifications

• B65D75/008 Primary

  Standing pouches, i.e. "Standbeutel" · CPC title

• B65D75/002

  in shrink films (B65D71/08 takes precedence) · CPC title

• B65D33/007

  for facilitating the separation of the two walls, e.g. walls of inequal height, tabs; for maintaining the mouth of the sack or bag open · CPC title

• B65D33/08

  Hand holes · CPC title