Rupturable blister pill package with safety backing

Abstract

A rupturable press-through blister type medicament or pill package is "childproofed" by securing a strong flexible polymeric backing sheet, such as polyethylene terephthalate, over the rupturable sheet in such a manner that the pill cannot be forced through the package unless the backing sheet is first peeled off.

What is claimed as new and desired to be secured by Letters Patent of the United States is: 
     
       1. A protective childproof package comprising: a first sheet having at least one flexible blister which forms a compartment, said at least one blister being adapted to receive a .Iadd.solid .Iaddend.medicament; said first sheet having a line of weakening along one edge;   a second sheet of rupturable material .Iadd.coextensive with said first sheet having no perforations above said compartment, and .Iaddend.secured .Iadd.along its entire surface, except below said blister, .Iaddend.to the first sheet, closing and sealing said compartment formed by the blister in the first sheet; and having a line of weakening along one edge so that when secured to the first sheet, the line of weakening in said first and second sheets are on the same edge of the package; and   a third imperforate sheet .Iadd.coextensive with said second sheet and .Iaddend.sealably secured .Iadd.along its entire surface .Iaddend.to the second sheet which third sheet has sufficient strength so that it can neither be ruptured nor forced out of engagement with the second sheet when force is applied to the medicament from the blister side of the package.   
     
     
       2. A protective childproof package as defined in claim 1 wherein the second sheet is a metal foil. 
     
     
       3. A protective childproof package as defined in claim 1 wherein the second sheet is paper. 
     
     
       4. A protective childproof package as defined in claim 1 wherein the first sheet is polystyrene. 
     
     
       5. A protective childproof package as defined in claim 1 wherein the first sheet is polyvinyl chloride. 
     
     
       6. A protective childproof package as defined in claim 1 wherein the third sheet is polyethylene terephthalate. 
     
     
       7. A protective childproof package as defined in claim 1 wherein the line of weakening in the first and second sheets are a line of intermittent perforations in said sheets. 
     
     
       8. A protective childproof package as defined in claim 1 wherein the line of weakening in the first and second sheets are a line of thinness in both the first and second sheets. 
     
     
       9. A protective childproof package as defined in claim 1 wherein the third sheet is secured to the second sheet by heat-sealing. 
     
     
       10. A protective childproof package as defined in claim 7 wherein the third sheet can be peeled from the second sheet after severing the first and second sheets along the line of weakening. .Iadd. 11. A protective childproof package comprising: a first sheet having at least one flexible blister which forms a compartment, said at least one blister being adapted to receive a solid medicament;   a second sheet comprising a rupturable material, secured to the first sheet and having no perforations above said compartment, closing and sealing said compartment formed by the blister in the first sheet; .Iaddend.   a third sheet coextensive with said second sheet and sealably secured along its entire surface to the second sheet, which third sheet has sufficient strength so that it can neither be ruptured nor forced out of engagement with the second sheet when force is applied to said medicament from the blister side of the package; and   means for removing said third sheet so that the medicament can be removed from the package. .Iadd. 12. A protective childproof package as defined in claim 11 further including   a line of weakening in said first sheet such that when said first sheet is severed along said line of weakening, said third sheet can be grasped separately from said first sheet for removal of said third sheet. .Iaddend..Iadd. 13. A protective childproof package as defined in claim 12 further including a line of weakening in said second sheet. .Iaddend. .Iadd. 14. A protective childproof package comprising:   a first sheet having at least one flexible blister which forms a compartment, said at least one blister being adapted to receive a solid medicament; said first sheet having a line of weakening along one edge;   a second sheet of rupturable material, coextensive with said first sheet and having no perforations above said compartment, and secured along its entire surface, except below said blister, to the first sheet, closing and sealing said compartment formed by the blister in the first sheet; and having a line of weakening along one edge so that when secured to the first sheet, the line of weakening in said first and second sheets are on the same edge of the package; and   a third sheet coextensive with said second sheet and sealably secured along its entire surface to the second sheet which third sheet has sufficient strength so that it can neither be ruptured nor forced out of engagement with the second sheet when force is applied to said medicament from the blister side of the package. .Iaddend..Iadd. 15. A protective childproof package comprising:   a first sheet having at least one flexible blister which forms a compartment, said at least one blister being adapted to receive a solid medicament;   a second sheet comprising a rupturable material, coextensive with said first sheet and having no perforations above said compartment, and secured to the first sheet, closing and sealing said compartment formed by the blister in the first sheet;   a third sheet coextensive with said second sheet and sealably secured along its entire surface to the second sheet, which third sheet has sufficient strength so that it can neither be ruptured nor forced out of engagement with the second sheet when force is applied to said medicament from the blister side of the package; and   means for obtaining access to said third sheet such that said third sheet can be grasped separately from said first sheet for removal of said third sheet from the package. .Iaddend.