Protective products, such as envelopes, having a unique combination of interior padding of expanded slit sheet paper and exterior lining of embossed paper

Patent metadata

Field	Value
Publication number	US-11261016-B2
Application number	US-202117218040-A
Country	US
Kind code	B2
Filing date	Mar 30, 2021
Priority date	Aug 5, 2018
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A protective product, such as, e.g., an envelope or pouch, is provided that includes at least one expanded slit paper sheet in an expanded state, and an embossed paper sheet facing the expanded slit paper sheet and fixed to the expanded slit paper sheet along at least a portion of a length in an expansion direction of the expanded slit sheet paper. In the preferred embodiments, the embossed paper sheet has a plurality of embossings that increase the rigidity of the embossed paper sheet, thereby inhibiting deformation of the embossed paper sheet that is fixed to the expanded slit sheet paper.

First claim

What is claimed is:

1. An envelope, comprising:
at least one expanded slit paper sheet in an expanded state, wherein in said expanded state said at least one expanded slit paper sheet exerts a contraction force in a direction of a non-expanded state of the at least one expanded slit paper sheet;
a first paper sheet facing a first face of said at least one expanded slit paper sheet and fixed in relation to said at least one expanded slit paper sheet along at least a portion of a periphery of said at least one expanded slit paper sheet;
a second paper sheet facing said at least one expanded slit paper sheet on an opposite face of said at least one expanded slit paper sheet from said first paper sheet and fixed in relation to said at least one expanded slit paper sheet along at least a portion of said periphery of said at least one expanded slit paper sheet;
wherein said envelop has a pouch with a cushioning wall, with the first paper sheet being an interior layer forming an interior wall of the pouch, the second paper sheet being an exterior layer forming an exterior wall of the pouch, and the at least one expanded slit paper sheet being between the interior layer and the exterior layer; and
wherein either a) at least one of said first paper sheet and said second paper sheet is an embossed sheet having a plurality of embossments that inhibit deformation of said first and second paper sheets due to said contraction force of said at least one expanded slit paper sheet wherein said embossments are distributed across at least one of the interior wall of said pouch and the exterior wall of said pouch or b) said first paper sheet and said second paper sheet are non-embossed sheets having a combined weight sufficient to inhibit deformation of said first and second paper sheets due to contraction forces of said at least one expanded slit paper sheet.

2. The envelope according to claim 1 , wherein each of said first paper sheet and said second paper sheet is a non-embossed sheet having a weight of 50# or more under the TAPPI standard paper weight specification for 3000 square feet.

3. The envelope according to claim 1 , wherein each of said first paper sheet and said second paper sheet is a non-embossed Kraft sheet having a weight of 50# or more under the TAPPI standard paper weight specification for 3000 square feet.

4. The envelope according to claim 1 , wherein said first paper sheet is a non-embossed Kraft sheet having a weight of 50# paper or more under the TAPPI standard paper weight specification for 3000 square feet.

5. The envelope according to claim 4 , wherein at least one of said first paper sheet and said second paper sheet is a sheet having a weight of 50# paper or more under the TAPPI standard paper weight specification for 3000 square feet.

6. The envelope according to claim 1 , wherein said first and second paper sheets are non-embossed paper sheets.

7. The envelope according to claim 1 , wherein said at least one expanded slit paper sheet is at least one substantially rectangular sheet that is fixed to at least one of the first paper sheet and the second paper sheet only at two opposite end regions of said at least one expanded slit paper sheet.

8. The envelope according to claim 7 , wherein said two opposite end regions of said at least one expanded slit paper sheet are opposite ends of said at least one expanded slit paper sheet in an expansion direction of the at least one expanded slit paper sheet.

9. The envelope according to claim 1 , wherein:
said first paper sheet and said second paper sheet contact said at least one expanded slit paper sheet within a central portion of said at least one expanded slit paper sheet but are free from connection to said at least one expanded slit paper sheet within said central portion of said at least one expanded slit paper sheet.

10. The envelope according to claim 1 , wherein said cushioning wall of said pouch is folded such that the cushioning wall forms both front and back walls of said pouch and such that said second paper sheet is an exterior layer on both front and back faces of the front and back walls of said pouch.

11. The envelope according to claim 10 , wherein the back wall of said pouch is longer than the front wall of said pouch, and wherein a portion of said first paper sheet that extends beyond an end of the front wall has an adhesive strip fixed thereto with a removable release liner for adhesively closing said envelope by removing the release liner and adhering said adhesive strip to the front wall.

12. The envelop according to claim 1 , wherein said at least one expanded slit paper sheet is an extensible sheet having an extensibility of greater than 3% in both a machine direction that extends longitudinally in a direction of expansion of the expandable slit paper sheet and in a cross direction that extends transverse to the direction of expansion of the expandable slit paper sheet.

13. The envelop according to claim 1 , wherein said at least one expanded slit paper sheet is an extensible sheet having an extensibility of at least 6% in a machine direction that extends longitudinally in a direction of expansion of the expandable slit paper sheet.

14. The envelop according to claim 1 , wherein said at least one expanded slit paper sheet is an extensible sheet having an extensibility of greater than 5% in both a machine direction that extends longitudinally in a direction of expansion of the expandable slit paper sheet and in a cross direction that extends transverse to the direction of expansion of the expandable slit paper sheet.

15. The envelop according to claim 1 , wherein said at least one expanded slit paper sheet is an extensible sheet having an extensibility of between 3-9% in a machine direction that extends longitudinally in a direction of expansion of the expandable slit paper sheet.

16. The envelope according to claim 1 , wherein at least one of said first paper sheet and said second paper sheet has a weight of 30# or more under the TAPPI standard paper weight specification for 3000 square feet.

17. The envelope according to claim 1 , wherein each of said first paper sheet and said second paper sheet has a weight of 30# or more under the TAPPI standard paper weight specification for 3000 square feet.

18. The envelope according to claim 1 , wherein at least one of said first paper sheet and said second paper sheet is a Kraft sheet having a weight of 30# paper or more under the TAPPI standard paper weight specification for 3000 square feet.

19. A method of making an envelope, comprising:
providing at least one expandable slit paper sheet;
providing a first paper sheet for facing a first face of said at least one expandable slit paper sheet;
providing a second paper sheet for facing the at least one expanded slit paper sheet on an opposite face of the at least one expanded slit paper sheet from the first paper sheet;
expanding the at least one expanded slit paper sheet to an expanded state and fixing the at least one expanded slit paper sheet at at least opposite portions of a periphery of the at least one expanded slit paper sheet in relation to the first paper sheet and the second paper sheet, the at least one expanded slit paper sheet in the expanded state exerting a contraction force in a direction of a non-expanded state of the at least one expanded slit paper sheet;
forming a cushioning wall for the envelop with the first paper sheet being an interior layer forming an interior wall of the pouch, the second paper sheet being an exterior layer forming an exterior wal

Assignees

• Goodrich David Paul

Inventors

• Goodrich David Paul

Classifications

• B65D65/44

  Applications of resilient shock-absorbing materials, e.g. foamed plastics material, honeycomb material · CPC title

• B65D65/406

  with at least one layer provided with a relief other than corrugations · CPC title

• B65B23/00

  Packaging fragile or shock-sensitive articles other than bottles; Unpacking eggs (embedding articles in shock-absorbing media B65B55/20) · CPC title

• B65D81/03 Primary

  Wrappers or envelopes with shock-absorbing properties, e.g. bubble films {(for thermal insulating purposes B65D81/3888)} · CPC title

• B31B2160/10

  rectangular and flat, i.e. without structural provision for thickness of contents · CPC title