Patent ID: 9573304
Date: 2017-02-21
CPC Classifications: B29C

Claim:
1. An in-mold detachable marking device comprising: a substantially cylindrical outer shell body for indication fit into a molding mold, an index body fit into said outer shell body for indication and configured to be angularly displaceable around the axis line of said outer shell body for indication, a cover body screwed at a lowermost part of said outer shell body for indication, and a spring which biases said index body with the downward force, said outer shell body for indication and said index body having a marking indication part formed on their surfaces, wherein said index body comprises an index part facing inner surface of said mold, a positioning part extending downward from said index part, and a shaft extending downward from said positioning part, said shaft having a threaded part in its lower part, said spring has an engaging part which engages with said threaded part of the index body, and a fixed part which is fixed to said cover body, pitch of said spring of said engaging part and pitch of said threaded part are equal, and said engaging part and said threaded part engage each other wherein a groove portion is formed on the cover body, said groove portion comprising an annular part and a linear part; wherein the fixed part is located at a lower part of the spring, and the fixed part has an annular part and a linear part; said annular part being arranged in the annular part of the groove portion of the cover body, and said linear part being arranged in the linear part of the groove portion of the cover body.