Storage bag

Patent metadata

Field	Value
Publication number	US-11517504-B2
Application number	US-202016777224-A
Country	US
Kind code	B2
Filing date	Jan 30, 2020
Priority date	Jul 31, 2014
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A method of making a storage bag comprising the following steps performed in any order: (a) forming a composite tube having an inner surface comprising a higher melting polymer, an outer surface comprising a lower melting polymer, two ends, and a diameter; (b) flattening the tube in a direction perpendicular to the diameter; (c) forming a joint at one of the ends at a temperature between respective melting points of the higher melting polymer and the lower melting polymer; (d) providing a composite sheet having a first side comprising a higher melting polymer and a second side comprising a lower melting polymer; and (e) disposing the composite sheet over the joint such that the first side comprising a lower melting polymer engages the joint and forming a lap seam over the joint at a temperature between respective melting points of the higher melting polymer and the lower melting polymer, and a storage bag made by such method.

First claim

What is claimed is:

1. A method of making a storage bag comprising the following steps performed in any order:
(a) forming a composite tube having an inner surface comprising a higher melting polymer, an outer surface comprising a lower melting polymer, two ends, and a longitudinal length extending between the two ends;
(b) flattening said tube along the longitudinal length of the tube;
(c) forming a joint at one of said two ends at a temperature between respective melting points of said higher melting polymer and said lower melting polymer;
(d) providing a composite sheet having a joint comprising a higher melting polymer and a second side comprising a lower melting polymer;
(e) disposing said composite sheet over said joint such that said first side comprising a lower melting polymer engages said joint and forming a lap seam over said joint at a temperature between respective melting points of said higher melting polymer and said lower melting polymer.

2. A method of making a storage bag as defined in claim 1 wherein said storage bag is a cryopreservation bag.

3. A method of making a storage bag as defined in claim 1 further comprising performing steps (c) through (e) at the other of said two ends.

4. A method of making a storage bag as defined in claim 3 further comprising the steps of forming a handle in said one of said ends and attaching ports and a brace to said other of said two ends.

5. A method of making a storage bag as defined in claim 4 wherein the ports are attached before the composite tube is formed.

6. A method of making a storage bag as defined in claim 4 wherein the ports are attached after the composite tube is formed.

7. A method of making a storage bag as defined in claim 1 wherein step (e) further comprising disposing a composite sheet on a back side of said joint.

8. A method of making a storage bag as defined in claim 1 wherein step (e) comprises folding said composite sheet over said one of said ends to form lap seam over front and back sides of said joint.

9. A method of making a storage bag as defined in claim 1 wherein said higher melting polymer is a non-melt-processible polymer.

10. A method of making a storage bag as defined in claim 1 wherein said higher melting polymer is polytetrafluoroethylene.

11. A method of making a storage bag as defined in claim 1 wherein said higher melting polymer is polyimide.

12. A method of making a storage bag as defined in claim 1 wherein said lower melting polymer is a melt-processible polymer.

13. A method of making a storage bag as defined in claim 1 wherein said lower melting polymer is FEP.

14. A method of making a cryopreservation bag comprising the following steps performed in any order:
(a) forming a composite tube having an inner surface comprising a non-melt-processible polymer, an outer surface comprising a melt-processible polymer, two ends,
wherein the tube is divided into a first half and a second half,
wherein each of the first half and the second half extends longitudinally between the two ends;

(b) providing, on at least one of said two ends of said tube, an extension of said first half of said tube;
(c) flattening said tube along a longitudinal length of the tube;
(d) dividing said extension into at least three sections having edges;
(e) folding said three sections such that said edges engage said second half of said tube to form a joint;
(f) providing a composite sheet having a first side comprising a non-melt-processible polymer and a second side comprising a melt-processible polymer;
(g) folding said composite sheet over said joint such that said first side comprising a melt-processible polymer engages said joint to form a lap seam over said joint.

Assignees

• Gore & Ass

Inventors

• Snyder Bret A
• Nase Basak Irem
• Bacino John E
• Shamrock William

Classifications

• B65D33/00

  Details of, or accessories for, sacks or bags · CPC title

• B29C66/71

  characterised by the composition of the plastics material of the parts to be joined (welding bar compositions B29C65/125) · CPC title

• B29C66/91411

  of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account · CPC title

• B31B2150/00

  Flexible containers made from sheets or blanks, e.g. from flattened tubes · CPC title

• B29C65/5042

  covering both elements to be joined · CPC title