Blow molded plastic bottle and plastic cap
AssigneeMaxcap, Inc.
InventorLeo Von Hagel
Life of this patent
Estimating the term…
Abstract
A milk bottle has an antitamper cap having a plug adapted to fit into the mouth of the bottle. The neck of the bottle is tapered toward the mouth and the cap has means for restraining the top of the neck to keep the mouth in good sealing contact with the plug when the cap is screwed on.
Claims38
A combination of a blow molded plastic bottle and a plastic cap, comprising
- (a) a bottle neck having a mouth, an external screw thread below said mouth and an inwardly directed portion at said mouth,
- (b) said plastic cap adapted to be screwed onto said neck to cover said mouth and having an upper wall, a side wall with an internal thread corresponding to said external thread, and a downwardly directed circular plug for engaging said inwardly directed portion when said cap is screwed onto said neck and to form an anti-leak seal with said inwardly directed portion,
- (c) cooperating antitamper means on said cap and bottle and including a permanently deformable element, said antitamper means permitting said cap to be rotated in one direction to screw said cap onto said neck to bring said plug into sealing relation to said mouth and then preventing rotation in an unscrewing direction unless said element is visibly deformed.
- said inwardly directed portion having an inner surface and an outer surface, said inner and outer surface each extending upwardly and inwardly above said threads at an angle of at least about 30.degree. to the horizontal,
- said plug having a circular outer surface for engaging said mouth, said outer surface of said plug being tapered to increase in diameter upwardly and to exert an outward force on said mouth and a corresponding inward force on said plug outer surface when said cap is screwed onto said neck.
A combination of a blow molded plastic milk bottle and a plastic cap, comprising
- (a) a bottle neck having a mouth, an external screw thread below said mouth and an inwardly directed portion of said mouth,
- (b) said plastic cap adapted to be screwed onto said neck to cover said mouth and having an upper wall, a side wall with an internal thread corresponding to said external thread, and a downwardly directed circular plug for engaging said inwardly directed portion when said cap is screwed onto said neck and to form an anti-leak seal with said inwardly directed portion,
- (c) cooperating antitamper means on said cap and bottle and including a permanently deformable element, said antitamper means permitting said cap to be rotated in one direction to screw said cap onto said neck to bring said plug into sealing relation to said mouth and then preventing rotation in an unscrewing direction unless said element is visibly deformed,
- said inwardly directed portion extending upwardly and inwardly above said threads at an angle of at least about 30.degree. to the horizontal,
- said plug having a circular outer surface for engaging said mouth, said outer surface being tapered to increase in diameter upwardly and to exert an outward force on said mouth and a corresponding inward force on said surface when said cap is screwed onto said neck,
- said cap having means surrounding the upper part of said plug for providing a space to receive the top of said neck and for restraining the top of said neck against substantial outward movement so as to keep said mouth in good sealing contact with said plug, said surrounding and restraining means comprising spaced ribs at the upper inner corner of said cap.
A molded plastic cap, for use with a blow molded plastic bottle having a neck, said neck having a mouth, an external screw thread below said mouth and an inwardly directed portion at said mouth, said plastic cap adapted to be screwed onto said neck to cover said mouth and having an upper wall, a cylindrical side wall with an internal thread corresponding to said external thread for engaging said external thread, and a downwardly directed circular plug for engaging said inwardly directed portion, when said cap is screwed onto said neck, and to form an antileak seal with said inwardly directed portion, said cap having antitamper means for cooperating with means on said bottle and including a permanently deformable element, said antitamper means permitting said cap to be rotated in one direction to screw said cap onto said neck to bring said plug into sealing relation to said mouth and then preventing rotation in an unscrewing direction unless said element is visibly deformed, said cap having upwardly and inwardly extending means at the inside of said cap above said internal thread for providing a space to receive the top of said neck and for restraining the top of said neck against substantial outward movement so as to keep said mouth in good sealing contact with said plug, said cap being molded of a polyolefin plastic, having an axial height of about 1/2 inch and an external diameter of about 11/2 inches, the walls of said cap being so thin that said cap weighs less than about 21/2 grams.
A molded plastic cap, for use with a blow molded plastic bottle having a neck, said neck having a mouth, an external screw thread below said mouth and an inwardly directed portion at said mouth, said plastic cap adapted to be screwed onto said neck to cover said mouth and having an upper wall, a side wall with an internal thread corresponding to said external thread, and a downwardly directed circular plug for engaging said inwardly directed portion, when said cap is screwed onto said neck, and to form an anti-leak seal with said inwardly directed portion, said cap having antitamper means for cooperating with means on said bottle and including a permanently deformable element, said antitamper means permitting said cap to be rotated in one direction to screw said cap onto said neck to bring said plug into sealing relation to said mouth and then preventing rotation in an unscrewing direction unless said element is visibly deformed, said cap having upwardly and inwardly extending means at the inside of said cap for providing a space to receive the top of said neck and for restraining the top of said neck against substantial outward movement so as to keep said mouth in good sealing contact with said plug, said upwardly and inwardly extending means comprising spaced ribs at the upper inner corner of said cap.
A blow molded plastic milk bottle having a neck, said neck having a mouth, an external screw thread below said mouth and an inwardly directed portion at said mouth, the wall thickness of said neck being about 0.02-0.03 inch,
- said neck being adapted to be capped by an internally threaded plastic cap having a downwardly directed circular plug for engaging said inwardly directed portion when said cap is screwed onto said neck, and to form an antileak seal with said inwardly directed portion,
- said inwardly directed portion having an inner surface and an outer surface, said inner and outer surfaces each extending upwardly and inwardly in frusto-conical form above said threads at an angle of at least about 30.degree. to the horizontal.
A combination of a blow molded plastic milk bottle and a plastic cap, comprising
- (a) a bottle neck having a mouth, an external screw thread below said mouth and an inwardly directed portion at said mouth,
- (b) said plastic cap adapted to be screwed onto said neck to cover said mouth and having an upper wall, a side wall with an internal thread corresponding to said external thread, and a downwardly directed circular plug for engaging said inwardly directed portion when said cap is screwed onto said neck and to form an anti-leak seal with said inwardly directed portion,
- (c) cooperating antitamper means on said cap and bottle and including a permanently deformable element, said antitamper means permitting said cap to be rotated in one direction to screw said cap onto said neck to bring said plug into sealing relation to said mouth and then preventing rotation in an unscrewing direction unless said element is visibly deformed,
- said inwardly directed portion extending upwardly and inwardly above said threads at an angle of at least about 15.degree. to the horizontal,
- said plug having a circular outer surface for engaging said mouth, said outer surface being tapered to increase in diameter upwardly and to exert an outward force on said mouth and a corresponding inward force on said surface when said cap is screwed onto said neck,
- said plug having means for backing up said inwardly and upwardly directed portion at a plurality of points situated below the uppermost part of the neck for substantially maintaining said angle.
A combination of a blow molded plastic milk bottle and a plastic cap, comprising
- (a) a bottle neck having a substantially circular mouth, an external screw thread below said mouth and an inwardly directed portion at said mouth,
- (b) said plastic cap adapted to be screwed onto said neck to cover said mouth and having an upper wall, a side wall with an internal thread corresponding to said external thread, and a downwardly directed circular plug for engaging said inwardly directed portion when said cap is screwed onto said neck and to form an anti-leak seal with said inwardly directed portion,
- (c) cooperating antitamper means on said cap and bottle and including a permanently deformable element, said antitamper means permitting said cap to be rotated in one direction to screw said cap onto said neck to bring said plug into sealing relation to said mouth and then preventing rotation in an unscrewing direction unless said element is visibly deformed,
- said plug having a circular outer surface for engaging said mouth, said outer surface being tapered to increase in diameter upwardly and to exert an outward force on said mouth and a corresponding inward force on said surface when said cap is screwed onto said neck,
- said plug having a substantially untapered cylindrical outer surface above its tapered outer surface and adapted to be engaged by said mouth,
- the dimensional relationships being such that screwing on the cap causes said mouth to expand resiliently around said tapered portion of said plug and then to seat resiliently on said substantially untapered cylindrical surface of said plug.
A combination of a blow molded plastic milk bottle and a plastic cap, comprising
- (a) a bottle neck having a substantially circular mouth, an external screw thread below said mouth and an inwardly directed portion at said mouth,
- (b) said plastic cap adapted to be screwed onto said neck to cover said mouth and having an upper wall, a side wall with an internal thread corresponding to said external thread, and a downwardly directed circular plug for engaging said inwardly directed portion when said cap is screwed onto said neck and to form an anti-leak seal with said inwardly directed portion,
- said plug having a circular outer surface for engaging said mouth, said outer surface being tapered to increase in diameter upwardly and to exert an outward force on said mouth and a corresponding inward force on said surface when said cap is screwed onto said neck,
- said plug having a substantially untapered cylindrical outer surface above its tapered outer surface and adapted to be engaged by said mouth,
- the dimensional relationships being such that screwing on the cap causes said mouth to expand resiliently around said tapered portion of said plug and then to seat resiliently on said substantially untapered cylindrical surface of said plug,
- said inwardly directed portion at said mouth extending upwardly and inwardly above said neck threads at an angle of at least about 15.degree. to the horizontal.
Dependencies are inferred from the claim text.