Claims
- 1. Aperture forming means of the type intended to be disposed within a hardenable plastic material while said material is in a substantially fluid state and, upon said material becoming substantially rigid, said forming means being removable from said material to thereby form therewithin said aperture, said aperture forming means comprising:
- (a) an elastomeric body portion having top and bottom portions, the top portion being intended to be disposed adjacent to and accessible through the exposed surface of the plastic material;
- (b) substantially rigid member means secured within said body portion;
- (c) means for grasping said rigid member means, said grasping means extending from within and without said body portion for engaging said rigid member means and for removing said body portion and said rigid member means from the hardened plastic material; and
- (d) locating means for securing to a form to thereby locate and receive therein said body portion within the plastic material.
- 2. Aperture forming means as recited in claim 1, wherein said locating means further comprises flange means for securing to the form and having upstanding support means extending therefrom to retain therein said body portion in a predetermined position.
- 3. Aperture forming means as recited in claim 2, wherein said body portion is substantially cylindrical, said locating means comprises a top-hat configuration such that said flange means is a radially extending brim, said upstanding support means is a substantially cylindrically-shaped crown open at the top to receive therein said cylindrical body portion; said crown extending a fraction of the axial length of said body portion.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation of application Ser. No. 580,871 filed May 27, 1975, now abandoned, which was in turn a continuation of application Ser. No. 423,151 filed Dec. 10, 1973, now abandoned.
US Referenced Citations (6)
Foreign Referenced Citations (9)
Number |
Date |
Country |
680724 |
Feb 1964 |
CAX |
733784 |
Jul 1955 |
GBX |
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GBX |
888200 |
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Continuations (2)
|
Number |
Date |
Country |
Parent |
580871 |
May 1975 |
|
Parent |
423151 |
Dec 1973 |
|