Abstract: A station for running foam-plastics material into shut molds has a mixing head with first and second driving systems, the one for moving the mixing head sideways to an inlet opening of each mold, and the other for moving the mixing head downwards into and upwards out of the inlet opening. The mixing head and the first driving system together with the second driving system are supported by a slide or carriage, which is guided along a section of the transport way of the smoothly moving molds. By way of a driving connection, the slide may be joined up with the mold which is to take up the plastics material and cleared from it again when the mold is full.
Abstract: An apparatus for insulating against conductive, convective, and radiant heat transmission comprises a plurality of mutually parallel sheets. The sheets may be attached to a retracting device from which they can be drawn to extend in mutually parallel relation and cover a building opening such as a window or onto which they can be retracted to uncover the opening. A number of spacers which may be in the form of collapsible or nestable devices are mounted within the apparatus to separate each pair of adjacent sheets and, thus, define a dead air space therebetween. At least one of the sheets has a surface, facing on the dead air space, that exhibits a low surface emittance. This surface emittance is sufficiently low to yield a total effective emissivity of the surface and dead air space of no greater than 0.60. Important, the spacer devices are designed so as not to abrade or otherwise harm the reflective surface.
Abstract: A gas-sealing device for gas-operated firearms of the tubular-magazine type in which a pair of radially flexible piston-rings are provided for sealing the gases within the annular chamber between the gas cylinder and the magazine tube. Each piston-ring is provided with a gas-impingement surface so disposed that the pressure of the gases in the gas chamber against such impingement surfaces forces one of the rings outward into sealing engagement with the walls of the cylinder and the other inward into sealing engagement with the magazine tube.
Abstract: Multi-station reaction injection molding apparatus, and method, are disclosed for in-place foaming of polymerizable resins in articles advanced along a production line, as for example in the manufacture of insulated appliance housings such as refrigerator cabinets. The articles are selectively diverted from a feed conveyor, one to each of a plurality of pour stations adjacent the feed conveyor. At the stations, injection of foamable resin mix is accomplished by reaction injection type molding heads which combine at least two liquid resin components. These components are suitably catalyzed to react and form a cellular or foamed polymerized resin. The liquid components are separately but continuously supplied to respective supply manifolds to which all of the heads are connected in parallel by shunting ducts. Excess unmixed liquid components are returned separately from each of the heads through recycle shunting ducts to respective recycle manifolds.
Abstract: A device for cutting a cylindrical article, such as a window shade or the like, comprises a tubular support for encircling the article and a guide mounted with the support for rotation about the support axis. The guide has a radially outwardly projecting arm that is formed to be engaged by an operator. A knife blade, having a cutting edge, is mounted in the guide for movement from a first position with the cutting edge tangentially intersecting the tubular section defined by the support to a second position with the cutting edge chordally intersecting the tubular section. A spring urges the knife from its first to its second position while the guide is rotated about the support.
Abstract: There is disclosed a capped machine nut comprising a polygonal-sided metal nut body having a conical bearing surface projecting from a first axial end, the opposite axial end and the polygonal sides of the body being encased in a sheet metal cup-shaped cap tightly conforming to the polygonal nut body but spaced from said opposite axial end to form a dome. The nut body is formed with a peripheral groove axially intermediate the polygonal sides and conical bearing surface, wherein the shoulder of the groove adjacent the polygonal sides is substantially right-angled so that the lip of the cap skirt can effectively grip the shoulder when crimped into the groove, and thereby retain the cap on the nut body. In a preferred form, the lip of the cap skirt is doubly crimped by folding the skirt edge into the groove at the apices of the polygonal sides, and also intermediate the polygonal apices.
Abstract: Apparatus is disclosed for manufacturing a resilient cushion of foamed plastics material with an integrated cover cloth. The apparatus includes means for accepting a piece of cover cloth between frames to dispose the cloth across the mouth of a vacuum mould and control the peripheral contraction of the cloth as it is drawn into the mould by vacuum, prior to casting the foamable plastics mix into the mould. The apparatus limits the amount of peripheral contraction permitted in the cloth to avoid wrinkles or plaits in the surface of the finished cushion.
Abstract: A tip seal dispenser valve for a pressurized container of a viscous product comprises a valve body, mountable with the container, which includes a hollow valve conduit that defines an outlet orifice and is in fluid communication with the interior of the container. The valve body also includes a hollow actuator channel laterally displaced from the valve conduit. A valve core, formed with a sealing tip, is mounted for axial reciprocal movement in the conduit between a closed position with the tip blocking the outlet orifice and an open position with the tip withdrawn inwardly from the orifice. A fin arrangement guides the core for proper movement in the conduit so that the tip correctly seats in the outlet orifice when closed. The valve core is operated by an actuator button, mounted for axial reciprocal movement in the actuator channel, that is linked to the core so that movement of one causes movement of the other. Further, a seal is associated with the actuator button and channel to prevent leakage thereby.
Abstract: A method and apparatus are disclosed for preshaping a sheet material, more particularly a textile and/or a plastic sheet, under differential pressure in a molding die, whereby to form a sack-like structure which becomes integrally incorporated as the cover of a foamed plastic cushion, vehicle seat, protective padding element or similar article, by the introduction of a self-foaming elastomeric material into the sack while it is being held in the molding die.
Abstract: A cylindrical drum and a roller are mounted for rotation with their respective axes horizontal. The periphery of the roller is adjacent to that of the drum and has one or more recesses of constant depth. The drum and the roller are rotated at the same peripheral speed. A farinaceous paste, supplied to the periphery of the roller in a zone remote from the drum, is repeatedly taken up by the recess or recesses and is transferred to the drum in the form of portions, which may be interconnected. The paste on the drum is heated, so that it is at least partially cooked to pastry, and the pastry is removed from the drum.
Abstract: A high pressure mixing head is disclosed for combining a plurality of reactive fluid polymeric components to form a mixture thereof for molding purposes. The mixing head incorporates an expulsion plunger operating in a mixing chamber into which the several components are admitted through individual inlet openings which are covered and uncovered by reciprocation of the plunger. The mixing head further incorporates inlet valves and valve chambers located respectively upstream of the several inlet openings and so arranged that the inlet valves prevent admission of the individual components into the mixing chamber, irrespective of the plunger position, unless a predetermined pressure of the respective components is attained. Each valve chamber is connected to component feed and return lines forming part of the respective component circulating systems so that component flow at relatively low pressure takes place at all times between mixing/molding periods of operation.
Abstract: An integrated cushion structure, such as automobile or aircraft seat or seat back, an office chair, or the like and the method of making it, are disclosed. The cushion structure is comprised of fabric or other pliable cover sheet material forming an envelope constituting the exposed surface as well as defining the shape or configuration of the cushion structure. The structure includes at least one internal pliable sheet material partitioning member disposed parallel to and co-extensive area-wise with the active seat or back-forming area of the finished product. The envelope is thus divided interiorily by the partitioning member into several compartments into which a foam mix is introduced. The method of manufacture involves first peripherally bonding together an assemblage of congruent cover and internal partitioning sheets, together with one or more similarly configured annular profile strips, to form a peripherally closed envelope.
Abstract: The invention relates to a frothing method for mixing a liquid propellant having a low boiling point with further components for the production of foamed material, more particularly polyurethane. The invention also relates to an apparatus for carrying out the method with a mixing head for high pressure mixing of the main components in a mixing chamber. The foam production is carried out in two stages involving a first chamber for receiving and premixing reactive polymeric components, and a second chamber intersected by the first into which the mix components are advanced while the frothing propellant is injected at the intersection. The frothed reactive polymeric mix is then discharged from the second chamber into a suitable mold for forming the finished polymerized product.
Abstract: A passive display cell is described on which a plurality of digits are located. The digits are composed of electrode segments opposite counter-electrodes. These are connected in a manner enabling reduction of the number of outputs. As described with respect to the embodiments, the digits are arranged in separate groups with a pair of counter-electrodes for each digit in one group being also connected to counter-electrodes of another digit in another group. A pattern of conductor leads are employed and located in a non-crossing manner to connect like electrode segments to provide a multiple digit display cell having a low number of outputs.
Abstract: A process is disclosed comprising laminating an anodically treated aluminum surface against a thermoset plastic substrate, whereby the surface of the substrate after chemically removing the aluminum has an improved affinity for the adherence thereon of electrolessly deposited metal films.
January 3, 1977
Date of Patent:
August 29, 1978
John J. Grunwald, Eugene D. D'Ottavio, Harold L. Rhodenizer, Michael S. Lombardo
Abstract: The invention relates to a method for the continuous manufacture of longitudinally slit foam pipes using an internal core and two outer mould portions, externally and spacedly surrounding the core, whereby the two outer mould portions are displaced in movement-conforming manner along a path with the formation of a continuous, annular channel open towards a core support and whereby further a sheet is curved in tubular or U-shaped manner, and just before entering the annular channel is supplied with a foam base material which is completely foamed in the annular channel, whereby the foamed hollow profile is formed.
Abstract: Mounting means for a door-check for a hatchway door hinged to swing between an elevated open position and a closed position and having torsion bars which serve not only as springs for counterbalancing the weight of the door, but also as the hinge pins for the door. Each torsion bar has a terminal portion which is bent backwardly into parallel relation with a straight portion, the terminal portion extending through the hinge and forming the hinge pin. The straight portion is secured at its other end to the hatchway frame and is twisted about the terminal portion by the hinge as the door is closed. The door-check member is mounted on the hatchway frame and is connected to a bracket mounted across the crook formed in the torsion bar where the terminal portion bends backward. The bracket therefore pivots about the hinge pin with the main portion of the torsion bar when the door is closed and provides a crank arm for actuating the door-check.
Abstract: A gas-power system for an autoloading shotgun in which a pair of gas cylinders are mounted on opposite sides of and between the barrel and the magazine tube. An inertial weight is slidably mounted on the magazine for engagement by the pistons, which are positively retained within their cylinders for limited movement when a shell is discharged. The inertial weight is connected to the bolt-mechanism by a pair of action bars.
Abstract: A molded carrying case for supporting and enclosing an article comprises a main body member having an interior wall shaped to generally conform to the article. At least one inwardly protruding structure is formed with this interior wall. A base member is formed with an upstanding interior wall, which complements the interior wall of the body member, and a floor recessed from the upstanding wall, shaped to receive the article. The base and body members are rigidly secured together by an interlocking rabbet and flange formation. The case is completed by a closure member that is hinged to the main body for movement between open and closed position. The closure member also has an interior wall formed with at least one inwardly projecting structure that extends from the upstanding base wall and complements the main body interior wall when in the closed position.