Cubic cushioning material and production method thereof

• US 20040163991A1
• Filed: 07/01/2003
• Published: 08/26/2004
• Est. Priority Date: 05/28/2002
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Kashiwara Seitai
• Original Assignee: Kabushiki Kaisha Kashiwara Seitai
• Inventors: Koyanagi, Yoshihumi, Koyanagi, Yoshihiro
• Granted Patent: US 7,066,331 B2
• Time in Patent Office: Days
• US Class Current: 206/521
• CPC Class Codes: B65D 81/052 filled with fluid, e.g. inflatable elements

Abstract

A cubiform cushioning medium 4 comprises a planar cushioning medium 1 with a plurality of cells 12 formed by partially bonding non-breathable flexible resin sheets and the cells 12 which air is encapsulated thereinside, and the planar cushioning medium 1 is folded and bonded partially to complete an opening A to be protected for containing. The cubiform cushioning medium 4 thus has lateral cushioning faces 31, 34 disposed at the side of the opening 42 and an bottom cushioning portion 35 disposed at the bottom of the opening 42 by bending the planar cushioning medium 1 at the bottom end of the lateral cushioning mediums 31, 34 so that the end cushioning medium 35 is folded upward to the top of the lateral cushioning mediums 31, 34.

Claims

1. A cubiform cushioning medium comprising a planar cushioning medium (1) with a plurality of cells (12) formed by partially sealing opposite non-breathable flexible resin sheets together, said cells (12) acting to cause cushioning effect by means of air encapsulated thereinside, characterized in that lateral cushioning faces (31, 34/61, 65) and bottom cushioning portions (35/66) are disposed by folding said planar cushioning medium (1), the lateral cushioning faces (31, 34) and the bottom cushioning portions (35/66) defining an opening (42) for containing an article (A) to be protected by bonding the overlapped ends thereof, wherein the bottom cushioning portions (35/66) are folded upward to the top of the lateral cushioning faces (31, 34/61, 65).

2. The cubiform cushioning medium as defined in claim 1, characterized in that the lateral cushioning faces (31, 34) are formed at the lateral side of the opening (42) so as to face opposite, the bottom cushioning portion (35) being arranged to connect the bottom end of the lateral cushioning faces (31, 34) and being folded along crease seals (22) formed therein.

3. The cubiform cushioning medium as defined in claim 1, characterized in that the lateral cushioning faces (61, 65) are formed at the side of the opening (42) so as to face opposite, and the bottom cushioning portion (66) is arranged to close the bottom end of the lateral cushioning faces (61, 65) by folding part of said portion along the lateral cushioning faces (61, 65) and by bonding the folded part of the cushioning portion (66), therein the lateral cushioning face (61, 65) are bonded together to form crease seals (52, 53) at desired length above from the bottom end of the lateral cushioning faces (61, 65).

4. The cubiform cushioning medium as defined in claim 2 or 3, characterized in that the respective right and left sides (1c, 1d) of the opposite lateral cushioning faces (31, 34/61, 65) are arranged and bonded together so as to encircle the opening (42).

5. The cubiform cushioning medium as defined in any one of claims 2 to 4, characterized in that the cells (12), strip-like elements formed in a vertical direction, are respectively provided with an air inlet (12a) for introducing air into each of the cells (12), and said crease seals (22/52, 53) are formed by partially bonding the cells (12) so as to allow air to flow in the cells (12).

6. A production process for a cubiform cushioning medium comprising a planar cushioning medium (1) with a plurality of cells (12) formed by partially sealing opposite non-breathable flexible resin sheets together, said cells (12) acting to cause cushioning effect by means of air encapsulated thereinside, characterized in that it comprise steps of partitioning the planar cushioning medium (1) into a first face (31), a second face (32), a third face (33), and a fourth face (34), all the faces lying vertically adjacent to each other, folding the faces (31 to 34) along lines (21 to 23) to place the first and fourth faces (31, 34) in an opposite position, tucking the second and third faces (32, 33) between the first and fourth faces (31, 34), and bonding the overlapped end of the respective left side (1c) and right side (1d) together in order to complete an opening (42) for containing an article (A) to be protected, thus being surrounded by the faces (31 to 34).

7. The production process for cubiform cushioning medium comprising a planar cushioning medium (1) with a plurality of cells (12) formed by partially sealing opposite non-breathable flexible resin sheets together, said cells (12) acting to cause cushioning effect by means of air encapsulated thereinside, characterized in that it comprises steps of partitioning a first face (61), a second face (62), a third face (63), a fourth face (64), and a fifth face (65), all the faces lying vertically adjacent to each other, and folding said faces (61 to 65) along lines (51 to 54) to place the first and fifth faces (61, 65) in the opposite positions, and contacting the first face (61) to the second face (62) and the fourth face (64) to the fifth face (65), and bonding the overlapped end of the respective left side (1c) and right side (1d) together in order to complete an opening (42) for containing an article (A) to be protected, thus being encircled by the faces (61 to 65).