|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||220/265 ; 215/250 ; 220/367 ; 229/7R|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 13 인용 특허 : 0|
A method and means for manufacturing a plastic lid with a frangible portion to facilitate the formation of an aperture is described. In one embodiment a platen having ruled steel cutting blades mounted thereon is pressed against a plastic lid backed up by a hardened steel anvil with sufficient force to merely score the plastic lid in accordance with the pattern of the cutting blades without actually breaking through the plastic lid. The scored area which forms said frangible portion of the lid may then be easily punctured to form a straw-slot or vent ope...
A thin-walled plastic closure lid for a container, said plastic characterized by the property of exhibiting stress patterns in areas proximate to cuts in said lid in response to the formation of said cuts, said stress pattern causing the weakening of said plastic in the area thereof, said lid having a frangiblE portion for selectively providing a straw receiving aperture therein, said fragible portion comprising: a first continuous score line on a surface of said lid extending along a first path; a second score line on said surface extending along a seco...