Abstract: The disclosure concerns a continuous mixer for plastic material and of the type which permits control of the pressure on the material being mixed in the mixer by resisting the flow of mixed material displaced from the mixer when unmixed material is fed into the mixer. The resistance to the discharged flow is effected by one or more elements which engage the flow and which are movable.

Abstract: The assembly includes a sidewall and bead plate ring mounted on a lower bladder hub plate in a press to extend generally radially therefrom for engaging the lower half of a retread matrix which is centered thereby, and a matrix register and centering ring is provided for attachment to the lower press platen after being moved into centering engagement with the lower matrix half whereby the matrix half can be removed from engagement with the said centering ring and then be replaced in centered relationship to the press by engagement with the centering ring.

Abstract: A container is provided for bulk mail, and the like, which has the form of a wheeled rack. The container is constructed to have a lower shelf and an intermediate shelf, both of which are hinged to a supporting frame, and each of which may be turned from a horizontal load supporting position to an upright position when the container is not in use to enable the container to be nested into other like containers so as to conserve space. The container also includes an intermediate frame which surrounds the intermediate shelf and which supports the intermediate shelf in its horizontal position, and which also is hinged to the supporting frame and may be turned with the intermediate shelf to an upright position. Also, the intermediate shelf may be turned up when the container is in use to provide sufficient space within the container for large or bulky packages or mail sacks, the same extending through and being restrained by the intermediate frame which remains in its horizontal position.

Abstract: A retainer bar assembly is provided comprising a vertical bar pivotally mounted at one corner of a rack to be movable from a first position, in which trays may be inserted into or removed from the open front of the rack, to a second position in which the bar extends vertically upwardly across the front of the rack to hold the trays securely in the rack and to prevent the trays from falling out of the rack, as the rack is transported from one location to another.

Abstract: A cargo security system is provided which can easily be mounted in delivery trucks of a wide variety of sizes, and which provides a positive means for preventing the load in the trucks from sliding, especially when the load comprises stacks of receptacles supported on wheeled dollies. The security system of the invention comprises a plurality of upright support posts which are mounted on the deck of the truck and which are attached to the underside of the top of the truck along a fore and aft axis displaced from one of the side walls of the truck. A similar security system may be mounted on the truck adjacent the opposite side wall thereof.

Abstract: Curing apparatus is provided which may be used for vulcanizing a pre-cured tread onto a suitably prepared tire casing; the pre-cured tread being initially adhesively attached to the tire casing. The apparatus provides a mold defining a chamber in which the tire casing and adhesively attached pre-cured tread are placed; and it includes means for establishing pressurized fluid, such as steam or air, within the interior of the tire casing, and pressurized fluid, such as steam, in the annular space between the casing and the inside peripheral surface of the chamber, so that a required heat and pressure condition may be established within the chamber to cause the tread to be vulcanized and permanently bonded to the casing. The apparatus of the invention, in a second embodiment, is used for vulcanizing uncured rubber to a tire casing to form the tread.

Abstract: A cooking pan assembly is provided which has particular utility in the industrial cooking of food, such as tuna fish. The cooking pan is particularly constructed so that it may conveniently be transported on usual conveyors within the cooking facility. Crimped wire-formed ends are provided for the pan which serve as handles and which prevent the contents of the pan from sliding through the front or rear ends thereof. The wire-formed ends are crimped loosely to the side walls and bottom of the pan for sanitary reasons so that there is only a point contact between the wire-formed ends and the sides and bottoms, and no areas are formed which would be conducive to build up of bacteria. There are no welds between the end members and the bottom or side walls of the pan, since such welds would produce two separate surfaces in intimate contact with one another which could harbor bacteria. The pan assembly is easy to clean thoroughly by a simple spray wash since there are no nooks or crannies in the assembly.

Abstract: A transporter is provided for bulk mail, and the like, in the form of a wheeled rack. The wheeled rack is constructed to have a lower shelf and an intermediate shelf, both of which are hinged to the frame of the rack, and both of which may be turned up to an upright position when the rack is not in use to enable the rack to be nested into other like racks so as to conserve space. The rack also has upper and lower extensible gates which are hinged to the forward edge of the intermediate shelf, and which may be turned to an upright position within the rack with the intermediate shelf when the rack is not in use. The gates, moreover, may be turned and extended to enclose the upper and lower portions of the open front of the rack, and locked in place, when the intermediate shelf is turned down to its operative, load-supporting position.

Abstract: A calender especially suitable for use with rubber and plastic material. One of two opposed rolls is movable toward and away from the other through direct action of long-stroke fluid actuators that move the bearing boxes on opposite ends of the movable roll. Roll spacing is directly sensed by position-sensitive transducers acting between opposed bearing boxes and responsive to the relative roll positions. The transducers signal changes and initiate correction to retain roll spacing at a set distance. The fluid actuators are controlled to separate the rolls upon power failure and to prevent roll contact in the event work product is not between the rolls.