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특허 상세정보

Filled polystyrene tear back container lids

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) B65D-051/20    A47G-019/22   
미국특허분류(USC) 220/712; 220/254.3; 220/270; 220/265; 220/832; 229/404
출원번호 UP-0682637 (2007-03-06)
등록번호 US-7845514 (2011-01-31)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 5  인용 특허 : 83

The invention relates to tear-back thermoformed high impact polystyrene lids having from at least 10% to about 15% of filler and the specified configuration of the tear-back portion. In particular, the tear back lid comprises a tear back portion defined by two sets of tear back indentations and a left and a right notch cut into a skirt defined by the outer diameter of the lid. The combination of the filler amount and tear-back configuration allows an improved tearability for the filled polystyrene lids.


What is claimed is: 1. A container lid prepared from an extruded sheet of a high impact polystyrene resin composition, wherein the high impact polystyrene resin composition comprises about 10% to about 15% filler, and wherein the lid comprises: a) a tear back portion defined by: i) a downwardly directed annular skirt defined by an outer diameter of the lid; ii) a tab in connecting relation with the skirt defining a grabbing location for a user, wherein the tab has a left side and a right side; iii) a left and a right notch cut into the skirt in substant...

이 특허에 인용된 특허 (83)

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  43. Matsubayashi Hiroshi (Kamakura JPX) Aizawa Masanori (Yokohama JPX) Watanabe Michio (Yokohama JPX) Shimizu Takashi (Yokohama JPX) Ikegami Tamotsu (Yokohama JPX). Easy-open lid in which score cut edge can be covered and process for preparation thereof. USP1989124887732.
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  81. Miyasaka Eiichi (Shizuoka JPX) Nishimura Tetsuro (Shizuoka JPX) Tanokura Nobukazu (Shizuoka JPX). Tube assembly provided with a breakaway plug. USP1990024899903.
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