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US 5,205,406 AGranted
Anti-static coated paperboard or similar rigid material
AssigneeBradford Company
InventorJudson A. Bradford
Life of this patent
Estimating the term…
Abstract
A multiple-ply anti-static paperboard having a layer of relatively rigid material to which at least one ply of permanently anti-static/static-dissipative material is applied. Containers, as well as dividers and pads for containers, are made of such multiple-ply board materials. The permanently anti-static/static-dissipative layer prevents a static charge from being created when articles are inserted into or removed from the containers and prevents paperboard or other dust from contacting and adversely affecting the packaged article.
Claims18
A container for packaging an article which can be damaged by static electricity, comprising:
- a box having sidewalls and top and bottom walls;
- a plurality of relatively rigid dividers located in said box, each said divider comprising a layer of relatively rigid material sandwiched between two layers of amine-free, permanently anti-static/static-dissipative material, said two layers of anti-static material having a permanent surface resistivity of greater than 10.sup.5 but less than 10.sup.12 ohm per square;
- each of said two layers being adhered while in a solid state to said layer of relatively rigid material and prior to being adhered to said layer of relatively rigid material being characterized by the same solid amine-free, permanently anti-static/static-dissipative characteristics as characterize said two layers after being adhered to said relatively rigid layer;
- and
- wherein said dividers partially define a predetermined number of cells within said box, each said cell providing protection from electrostatic charge for static electricity sensitive articles to be packaged therein.
2 more elements
A container for user in packaging an article which can be damaged by static electricity, comprising:
- a box having sidewalls and top and bottom walls;
- a plurality of relatively rigid dividers located in said box, each said divider comprising a layer of paperboard sandwiched between two layers of amine-free, permanently anti-static/static-dissipative material, said two layers of anti-static/static-dissipative material having a surface resistivity of more than 10.sup.5 but less than 10.sup.12 ohms per square;
- each of said two layers being adhered while in a solid state to said layer of paperboard and prior to being adhered to said layer of paperboard being characterized by the same solid amine-free, permanently anti-static/static-dissipative characteristics as characterize said two layers after being adhered to said layer of paperboard;
- and
- wherein said dividers partially define a predetermined number of cells within said box, each said cell providing protection from electrostatic charge for a static electricity sensitive article to be packaged therein.
2 more elements
A multiple-ply packaging material comprising:
- a first layer of relatively rigid material having first and second surfaces;
- a second layer of permanently anti-static/static-dissipative material applied to one of said first and second surfaces, said second layer being amine-free and having been applied while in the solid state and rendered permanently anti-static/static-dissipative prior to application to said one of said first and second surfaces;
- and
- said second layer having a surface resistivity of more than 10.sup.5 but less than 10.sup.12 ohms per square.
1 more element
A multiple-ply paperboard comprising:
- a first layer of permanently anti-static/static-dissipative material;
- a second layer of permanently anti-static material;
- a third layer of paperboard having first and second sides, said first and second layers being permanently applied to said first and second sides, respectively, of said paperboard so as to sandwich said paperboard between said first and second layers, said first and second layers being amine free and having been precast into solid form and rendered permanently anti-static/static-dissipative prior to application to said first and second sides of said paperboard;
- and
- wherein said first and second layers have a surface resistivity of more than 10.sup.5 but less than 10.sup.12 ohms per square.
2 more elements
A multiple-ply packaging material comprising:
- a first layer of permanently anti-static/static-dissipative material;
- a second layer of permanently anti-static/static-dissipative material;
- a third layer of relatively rigid material having first and second sides, said first and second layers being permanently applied to said first and second sides, respectively, of said relatively rigid material so as to sandwich said relatively rigid material between said first and second layers, said first and second layers being amine free and having been precast into solid form and rendered permanently anti-static/static-dissipative prior to application to said first and second sides of said rigid material;
- and
- wherein said first and second layers have a surface resistivity of more than 10.sup.5 but less than 10.sup.12 ohms per square.
2 more elements
A multiple-ply packaging material comprising:
- a first layer of relatively rigid material having first and second surfaces;
- a second layer of anti-static/static-dissipative material applied to one of said first and second surfaces, said second layer being amine-free and having a surface resistivity of more than 10.sup.5 but less than 10.sup.12 ohms per square;
- and
- said second layer having been applied to said one of said first and second surfaces while in a solid state, said second layer while in said solid state and before application to said one of said first and second surfaces being characterized by the same amine-free, anti-static/static-dissipative characteristics as characterize said second layer after being applied to said one of said first and second surfaces.
1 more element
Dependencies are inferred from the claim text.