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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0395830 (1973-09-10) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 14 인용 특허 : 0 |
A composite foamed synthetic resin bowling pin is formed by first placing a base support element composed of a disc element and having a central sleeve with a hollow reinforcing tube secured thereto and an annular collar with an outwardly extending transverse flange thereon of lesser diameter than t
In a method for producing a bowling pin having a substantially rigid tube, a base support element composed of a flattened disc, one surface of which is modified to form an axially aligned collar and sleeve, to which sleeve is secured one end of said tube, said collar and sleeve being disposed coaxia
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