초록 ▼

A bag having a tamper evident closure and methods of forming the same are provided. The bag has a tube body with a front wall and a back wall positioned between a first end and a second end. A back flap extension member connects to and extends outwardly from the second end of the back wall. A primer

A bag having a tamper evident closure and methods of forming the same are provided. The bag has a tube body with a front wall and a back wall positioned between a first end and a second end. A back flap extension member connects to and extends outwardly from the second end of the back wall. A primer material is positioned on the back flap extension member and an adhesive material is placed on the back flap extension member that folds over to overlie and contact the primer material. The back flap extension member adheres to the front flap extension member and portions of the front wall to close the second end. When the back flap extension member liftingly separates from the front wall, at least one of the back flap extension member and the front wall tears indicating evidence of tampering.

대표청구항 ▼

The invention claimed is: 1. A bag comprising: a tube body having a first end, a second end positioned substantially opposite the first end, a front wall positioned between the first end and the second end, and a back wall positioned to face opposite the front wall between the first end and the sec

The invention claimed is: 1. A bag comprising: a tube body having a first end, a second end positioned substantially opposite the first end, a front wall positioned between the first end and the second end, and a back wall positioned to face opposite the front wall between the first end and the second end, the front wall having at least one outermost layer of porous material; a back flap extension member connected to and extending outwardly from the second end of the back wall, the back flap extension member being adapted to fold over, overlie, and adhere to selected second end portions of an outer surface of the front wall when in a closed position to thereby securely close the second end; a primer material positioned on and overlying selected portions of an outer surface of the front wall to thereby define a first bond region between the front wall and the primer material, the primer material also defining a liquid surface treatment on the outer surface of the front wall to penetrate into the outermost layer of porous material to promote further bonding; and an adhesive material positioned on and overlying the back flap extension member to thereby define a second bond region between the primer material and the adhesive material when the back flap extension member is folded over the selected second end portions of the outer surface of the front wall and the adhesive material contacts the primer material. 2. A bag as defined in claim 1, further comprising a front flap extension member connected to and extending outwardly from the second end of the front wall, the back flap extension member folding over and overlying the front flap extension and the selected second end portions of the outer surface of the front wall, the back flap extension member also being adhered to the front flap extension and the selected second end portions of the outer surface of the front wall. 3. A bag comprising: a tube body having a first end, a second end positioned substantially opposite the first end, a front wall positioned between the first end and the second end, and a back wall positioned to face opposite the front wall between the first end and the second end, a first end front flap extension member connected to and extending outwardly from the first end of the front wall, the first end front flap extension member being adapted to fold over, overlie, and adhere to the selected first end portions of the back wall when in a closed position to thereby securely close the first end; a first end primer material positioned on and overlying selected first end portions of an outer surface of the back wall to thereby define a first end first bond region between the selected first end portions of the outer surface of the back wall and the first end primer material; a first end adhesive material positioned on and overlying the first end front flap extension member to thereby define a first end second bond region between the first end primer material and the first end adhesive material when the first end front flap extension member is folded over the first end front flap extension member and the selected first end portions of the back wall and the first end adhesive material contacts the first end primer material, the first end first bond region and the first end second bond region each having a strength such that when the first end front flap extension member liftingly separates from the back wall, at least one of the selected first end portions of the back wall and the first end front flap extension member tears to thereby define a tear region and so that the tear region indicates that tampering with the first end of the bag has occurred; a second end back flap extension member connected to and extending outwardly from the second end of the back wall, the second end back flap extension member is adapted to fold over, overlie, and adhere to selected second end portions of the front wall when in a closed position to thereby securely close the second end; a second end primer material positioned on and overlying selected second end portions of the front wall to thereby define a second end first bond region between the selected second end portions of the front wall and the second end primer material; and a second end adhesive material positioned on and overlying the second end back flap extension member to thereby define a second end second bond region between the second end primer material and the second end adhesive material when the second end back flap extension member is folded over the second end back flap extension member and the selected second end portions of the front wall and the second end adhesive material contacts the second end primer material, the second end first bond region and the second end second bond region each having a strength such that when the second end back flap extension member liftingly separates from the selected second end portions of the front wall, at least one of the selected second end portions of the front wall and the second end back flap extension member tears to thereby define a tear region and so that the tear region indicates that tampering with the second end of the bag has occurred. 4. A bag as defined in claim 3, wherein the first end adhesive material also contacts and overlies the selected first end portions of the outer surface of the back wall when the first end front flap extension member is folded over the selected first end portions of the outer surface of the back wall and wherein the second end adhesive material also contacts and overlies the selected second end portions of the outer surface of the front wall when the second end back flap extension member is folded over the selected second end portions of the outer surface of the front wall. 5. A bag comprising: a bag body having a pair of opposing walls, at least one of the opposing walls having at least one outermost layer of porous material; and a tamper evident seal connected to an end of at least one of the pair of walls, the tamper evident seal comprising: a flap extension member connected to and extending outwardly from the at least one wall and folded over selected portions to overlie the other one of the pair of walls; and a bond enhancer positioned between the flap extension member and the selected portions of the other one of the pair of walls of the bag body, a portion of the bond enhancer defining a liquid surface treatment on the outer surface of the at least one of the opposing walls having the at least one outermost layer of porous material to penetrate into the porous material, the bond enhancer thereby enhancing the bonding strength so that at least one of the flap extension member and the other one of the pair of walls tears instead of the bond enhancer separating during lifting of the flap extension member to thereby define a tear region and so that the tear region indicates that tampering with the seal has occurred. 6. A bag as defined in claim 5, wherein the bond enhancer is formed by a primer material positioned on and overlying substantially all of the selected portions of the other one of the pair of walls and an adhesive material positioned on and overlying the flap extension member, the primer material and adhesive material contacting each other when the flap extension member is folded. 7. A bag as defined in claim 6, wherein the adhesive material comprises a first polyolefin polymer and the primer material comprises a second polyolefin polymer, wherein the second polyolefin polymer has a different chemical polyolefin composition from the first polyolefin polymer. 8. A bag as defined in claim 6, wherein the first polyolefin polymer comprises a modified polyolefin polymer and the second polyolefin polymer comprises a vinyl acetate polymer. 9. A tamper evident seal comprising: a flap extension member connected to and extending outwardly from at least one wall of a bag body having a pair of opposing walls, at least one of the opposing walls having at least one outermost layer of porous material, and folded over selected portions to overlie the other one of the pair of walls; and a bond enhancer positioned between the flap extension member and the selected portions of the other one of the pair of walls of the bag body, a portion of the bond enhancer defining a liquid surface treatment on the outer surface of the at least one of the opposing walls having the at least one outermost layer of porous material to penetrate into the porous material, the bond enhancer thereby enhancing the bonding strength so that at least one of the flap extension member and the other one of the pair of walls tears instead of the bond enhancer separating during lifting of the flap extension member to thereby define a tear region and so that the tear region indicates that tampering with the seal has occurred. 10. A tamper evident seal as defined in claim 9, wherein the bond enhancer is formed by a primer material positioned on and overlying substantially all of the selected second end portions of the front wall and an adhesive material positioned on and overlying the flap extension member, the primer material and adhesive material contacting each other when the flap extension member is folded. 11. A bag as defined in claim 9, wherein the adhesive material comprises a first polyolefin polymer and the primer material comprises a second polyolefin polymer, wherein the second polyolefin polymer has a different chemical polyolefin composition from the first polyolefin polymer. 12. A bag as defined in claim 11, wherein the first polyolefin polymer comprises a modified polyolefin polymer and the second polyolefin polymer comprises a vinyl acetate polymer. 13. A bag comprising: a tube body having a first end, a second end positioned substantially opposite the first end, a front wall positioned between the first end and the second end, and a back wall positioned to face opposite the front wall between the first end and the second end, the front wall having an outer surface with selected second end portions including at least one outermost layer of porous material; a front flap extension member connected to and extending outwardly from the second end of the front wall; a back flap extension member connected to and extending outwardly from the second end of the back wall, the back flap extension member adapted to fold over, overlie, and adhere to the front flap extension member and the selected second end portions of the outer surface of the front wall when in a closed position to thereby securely close the second end; a primer material positioned on and overlying the selected second end portions of the outer surface of the front wall to thereby define a first bond region between the front wall and the primer material, the primer material also defining a liquid surface treatment in the selected second end portions of the outer surface of the front wall to promote further bonding between an adhesive material and the selected second end portions of the outer surface of the front wall when the back flap extension member is folded over the front flap extension member and the selected second end portions of the outer surface of the front wall and the adhesive material contacts the primer material, the primer material of the liquid surface treatment penetrating into the porous material of the at least one outermost layer of the outer surface to thereby define a primer integration zone on the outer surface of the front wall; and an adhesive material positioned on and overlying the back flap extension member to thereby define a second bond region between the primer material and the adhesive material when the back flap extension member is folded over the front flap extension member and the selected second end portions of the outer surface of the front wall and the adhesive material contact the primer material, the first bond region and the second bond region each having a strength such that when the back flap extension member liftingly separates from at least one of the selected second end portions of the outer surface of the front wall and the front flap extension member at least one of the selected second end portions of the outer surface of the front wall and the back flap extension member tears to thereby define a tear region so that the tear region indicates that tampering with the second end of the bag has occurred. 14. A bag comprising: a tube body having a first end, a second end positioned substantially opposite the first end, a front wall positioned between the first end and the second end, and a back wall positioned to face opposite the front wall between the first end and the second end, the front wall having an outer layer formed of a material capable of being torn due to the material being weaker than a first bond region, the material selected from the group of: a paper material, a metal foil material, and a plastic material; a back flap extension member connected to and extending outwardly from the second end of the back wall, the back flap extension member being folded over and overlying selected second end portions of an outer surface of the front wall; a primer material positioned on, abuttingly contacting and overlying the selected second end portions of the outer surface of the front wall to thereby define a first bond region between the selected second end portions of the outer surface of the front wall and the primer material; and an adhesive material positioned on, abuttingly contacting and overlying the back flap extension member to thereby define a second bond region between the primer material and the adhesive material once the back flap extension member is folded over the selected second end portions of the outer surface of the front wall and the adhesive material contacts the primer material so that the back flap extension member adheres to the selected second end portions of the outer surface of the front wall to thereby securely close the second end, the first bond region and the second bond region each having a strength such that when the back flap extension member liftingly separates from the front wall at least one of the selected second end portions of the outer surface of the front wall and the back flap extension member tears to thereby define a tear region so that the tear region indicates that tampering with the second end of the bag has occurred. 15. A bag comprising: a tube body having a first end, a second end positioned substantially opposite the first end, a front wall positioned between the first end and the second end, and a back wall positioned to face opposite the front wall between the first end and the second end; a first end front flap extension member connected to and extending outwardly from the first end of the front wall, the first end front flap extension member being adapted to fold over, overlie, and adhere to the selected first end portions of the back wall when in a closed position to thereby securely close the first end; a first end primer material positioned on and overlying selected first end portions of an outer surface of the back wall to thereby define a first end first bond region between the selected first end portions of the outer surface of the back wall and the first end primer material; a first end adhesive material positioned on and overlying the first end front flap extension member to thereby define a first end second bond region between the first end primer material and the first end adhesive material when the first end front flap extension member is folded over the first end front flap extension member and the selected first end portions of the back wall and the first end adhesive material contacts the first end primer material, the first end adhesive material also contacting and overlying the selected first end portions of the outer surface of the back wall when the first end front flap extension member is folded over the selected first end portions of the outer surface of the back wall, the first end first bond region and the first end second bond region each having a strength such that when the first end front flap extension member liftingly separates from the back wall, at least one of the selected first end portions of the back wall and the first end front flap extension member tears to thereby define a tear region and so that the tear region indicates that tampering with the first end of the bag has occurred; a second end back flap extension member connected to and extending outwardly from the second end of the back wall, the second end back flap extension member is adapted to fold over, overlie, and adhere to selected second end portions of the front wall when in a closed position to thereby securely close the second end; a second end primer material positioned on and overlying selected second end portions of the front wall to thereby define a second end first bond region between the selected second end portions of the front wall and the second end primer material; and a second end adhesive material positioned on and overlying the second end back flap extension member to thereby define a second end second bond region between the second end primer material and the second end adhesive material when the second end back flap extension member is folded over the second end back flap extension member and the selected second end portions of the front wall and the second end adhesive material contacts the second end primer material, the second end adhesive material also contacting and overlying the selected second end portions of the outer surface of the front wall when the second end back flap extension member is folded over the selected second end portions of the outer surface of the front wall, the second end first bond region and the second end second bond region each having a strength such that when the second end back flap extension member liftingly separates from the selected second end portions of the front wall, at least one of the selected second end portions of the front wall and the second end back flap extension member tears to thereby define a tear region and so that the tear region indicates that tampering with the second end of the bag has occurred.