Abstract: A pair of rotary die cylinders each removably mountable in a die stand by a pair of opposed arbor assemblies each with a separate spindle journaled in a separate carrier block and having a nose drawable into engagement with complementary recesses in opposed ends of the die cylinder in coaxial alignment with the axis of the die cylinder. The noses of the spindles are removably engaged in the recess by a drawbar extending through each cylinder. The carrier blocks are removably slidably received in slots in a pair of spaced apart uprights of the die stand.

Abstract: A solenoid actuated fuel injector for liquified petroleum gas (LPG), compressed natural gas (CNG) or the like has a fuel passage therethrough and a valve to control the flow of fuel through the fuel passage. The valve has a valve head formed of a generally flexible and substantially resilient material engageable with a valve seat to prevent fuel flow through the injector. The valve is preferably spring biased to a closed position which compresses the valve head against the valve seat to prevent fuel flow between them. Compression of the valve head is preferably limited by contact between the metal valve body and the metal valve seat which limits the travel of the valve body relative to the valve seat. The valve head and valve seat are also constructed to be highly resistant to wear to provide a consistent seal between them.

Abstract: The invention provides a method and system for continuously recovering carbon black from a plurality of composites where each one of the composites comprises carbon black and polymers. The basic method of the invention comprises a heating step which is conducted in a reactor. In the method, it is necessary to prepare a series of mixtures of the composites, with each one of the series comprising a distribution of carbon black properties substantially similar to the other mixtures of the series. The composites may be fragmentized or comminuted into smaller pieces more suitable for pyrolysis and decomposition reactions in the reactor. In the reactor, the fragmentized mixtures are heated to a temperature sufficient to crack the polymers and to form a vaporizable constituent. The vaporizable constituents are removed from the reactor at first and second outlet ends whereby the amount of time the vaporized constituents are in the reactor is reduced.

Abstract: A roof vent comprising a one piece plastic body including a base wall having transversely spaced rows of integral vanes extending from one surface thereof. The vanes of adjacent rows are positioned such that the vanes define a sinuous path. Preferably, one of each of the rows has the wings extending at an acute angle to the axis of the wall and the other row of each set of rows has the wings extending at an oppositely directed acute axis to the longitudinal axis of the wall toward the wings of the one row. Thus air is vented through sinuous paths outwardly when the vent is positioned with the wings engaging the roof and the base wall spaced from the roof. Water and snow are prevented by the wings from entry beneath the vent into the building.