Molecularly oriented bottle

Claim 2

A BOTTLE FOR A BEVERAGE UNDER PRESSURE FORMED OF A POLYMER WHEREIN THE MAJOR CONSTITUENT IS POLYMERIZED ACRYLONITRILE MONOMER, SAID BOTTLE COMPRISING: A. A GENERALLY CYLINDRICAL BODY WHICH INCLUDES A SIDEWALL PORTION HAVING A DISCHARGE OPENING AT ITS UPPER END AND MEANS FORMED THEREIN ADJACENT SAID OPENING FOR COOPERATING WITH A PRESSURE-CONFINING CLOSURE; B. A BOTTOM PORTION AT THE OTHER END OF THE SIDEWALL PORTION COMPRISING A SUBSTANTIALLY TOROIDAL SEGMENT BETWEEN THE SIDEWALL AND AN INNER BASE WALL SURROUNDED BY AND INTEGRAL WITH SAID TOROIDAL SEGMENTED AND CLOSING OFF THE BOTTOM PORTION OF THE BOTTLE, THE RADIUS OF CURVATURE OF SAID TOROIDAL SEGMENT BEING BETWEEN 10 TO 20 PERCENT OF THE MAXIMUM DIAMETER OF THE GENERALLY CYLINDRICAL BODY, THE SURFACE AREA OF SAID TOROIDAL SEGMENT BEING AT LEAST 30 PERCENT OF THAT OF A FULL TORUS, SAID TOROIDAL SEGMENT HAVING A VARYING OVERALL WALL THICKNESS WITHIN A RANGE OF BETWEEN 12 TO 60 MILS, SAID THICKNESS GRADUALLY INCREASING

Claim 3

A bottle for a beverage under pressure formed of a polymer wherein the major constituent is polymerized acrylonitrile monomer, said bottle comprising: a. a generally cylindrical body which includes a sidewall portion having a discharge opening at its upper end and means formed therein adjacent said opening for cooperating with a pressure-confining closure; b. a bottom portion at the other end of the sidewall portion comprising a substantially toroidal segment between the sidewall and an inner base wall surrounded by and integral with said toroidal segment and closing off the bottom portion of the bottle, the radius of curvature of said toroidal segment being between 10 to 20 percent of the maximum diameter of the generally cylindrical body, the surface area of said toroidal segment being at least 30 percent of that of a full torus, said toroidal segment having a varying overall wall thickness within a range of between 12 to 60 mils, said thickness gradually increasing within such range along said toroidal segment toward said inner base wall; and c. the polymer in at least a portion of said segment being molecularly oriented exhibiting an orientation release stress of at least 50 psi in both the axial and circumferential directions.

Claim 4

A bottle for a beverage under pressure formed of a polymer wherein the major constituent is polymerized acrylonitrile monomer, said bottle comprising: a. a generally cylindrical body which includes a sidewall portion having a discharge opening at its upper end and means formed therein adjacent said opening for cooperating with a pressure-confining closure; b. a bottom portion at the other end of the sidewall portion comprising a substantially toroidal segment between the sidewall and an inner base wall surrounded by and integral with said toroidal segment and closing off the bottom portion of the bottle, the radius of curvature of said toroidal segment being between 10 to 20 percent of the maximum diameter of the generally cylindrical body, the surface area of said toroidal segment being at least 30 percent of that of a full torus, said toroidal segment having a varying overall wall thickness within a range of between 12 to 60 mils, said thickness gradually increasing within such range along said toroidal segment toward said inner base wall; and c. the polymer in at least a portion of said segment being molecularly oriented exhibiting an orientation release stress of at least 50 psi in both the axial and circumferential directions.

Claim 5

The bottle of claim 1 wherein said polymer comprises 60-80 weight percent polymerized acrylonitrile and 40-10 weight percent of at least one other monomer copolymerized therewith.

Claim 6

The bottle of claim 1 wherein said polymer includes as minor constituents polymerized methacrylonitrile monomer plus at least one other copolymerized monomer.

Claim 7

The bottle of claim 1 wherein the inner base wall has a curved portion having a radius substantially equal to but reverse from the radius of curvature of the toroidal segment, said curved portion merging into said segment.

Claim 8

The bottle of claim 1 wherein the height of the inner base wall above the lowermost surface of the toroidal segment is between 5 to 30 percent of the greatest diameter of the bottle.

Claim 9

The bottle of claim 1 wherein the orientation release stress of said toroidal segment is between 50 to 200 psi in the axial direction and between 50 to 450 psi in the circumferential direction.

Claim 10

The bottle of claim 2 wherein styrene is the other copolymerized monomer.

Claim 11

The bottle of claim 3 wherein styrene is the other copolymerized monomer.

Claim 12

THe bottle of claim 1 wherein said sidewall portion has a right cylindrical section at its lower end joined to said toroidal segment.

Claim 13

The bottle of claim 1 wherein said toroidal segment has an unchanging radius forming the radius of curvature thereof.