| 摘要 |
<p>1503745 Porous blow core NATIONAL CAN CORP 5 March 1975 [5 March 1974 41490/77 Divided out of 1503744 Heading B5A The disclosure is the same as that of the parent Specification but the claims are directed to a porous core rod comprising a body member 54 to which is slidably mounted a head member 52 which includes a base 58 having orifices 68 for the passage of fluid and a core pin 60 having a part 74 made of porous material, the head member 52 being spring biased with respect to the body member 54 and the core pin 60 being in communication with a fluid conduit 86 in the body member 54 through the orifices 68 in the base 58.</p> |
