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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | US-0390680 (1973-08-22) |
발명자 / 주소 |
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인용정보 | 피인용 횟수 : 8 인용 특허 : 0 |
A pair of paper board panels are joined together by means of a seam structure comprising interlocking portions of the two panels. The first panel has a plurality of spaced partial perforations which define the plurality of flat first tabs each of which is displaced away from one side of the first pa
A seam structure comprising a first panel having a plurality of spaced, rounded partial perforations therein bounded by the material of said first panel and defining a plurality of flat first tabs each of which is displaced away from one side of said first panel about a hinge line comprising the unc
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