A refuse shredder, which includes a rotor assembly and a housing, has removable shredder hammers which are adapted for replacement without disassembly of the rotor. The hammers have compound slots formed in the hammer bodies and have entry openings leading to the slots, whereby they are mounted on vertical hammer shafts of the rotor assembly.

Machine pour la fabrication de bouteilles en matière plastique dont le fond est muni d'un élément en forme de coupelle. La machine comprend des moyens pour effectuer un test d'étanchéité au moyen d'un gaz assurant une rigidification du corps des bouteilles (11) qui permet en meme temps d'utiliser des moyens pour la pose d'une coupelles (47) sur ledit corps par emboitement axial. L'invention est ut...

A method of providing a foam accoustical insulation, thermal insulation, and/or moisture-barrier, in which a polyurethane prepolymer composition is applied to a substrate in situ and then expanded and cured using water pre-applied to the substrate, ambient atmospheric moisture, and/or added atmospheric moisture.

A digital control system is provided with an error monitor system which applies dummy loads to an actuator and a monitor lamp in order to check the operation thereof. The digital control system also has a watch-dog timer responsive to a periodic signal produced as long as a microprocessor of the control system is operating normally. The control system is adapted to be initialized in response to th...

The locations of defects in flat glass (1) are detected during conveyance through a detection station where the glass is scanned by a radiation beam (11). The beam sweeps transversely across the path of the glass through a distance in excess of the glass width so that the beam sweeps through both side edges. Beam deflection occurs when the beam encounters a side edge boundary of the glass (1) and ...

A laser control device includes a pulse repetition interval timer and a pulse width timer that, upon each setting, directs one pulse having a predetermined pulse width to a laser system that emits a laser beam in response thereto. A pulse cycle timer is provided which sets the pulse width timer at preset intervals during a time period from its initial setting until the resetting thereof. The pulse...

A method and apparatus of detecting fractures along the wall of a formation, such as a well formed by test-drilling, provides for the transmission of ultrasonic signals in a direction essentially perpendicular to the wall from a position spaced from the wall by a predetermined distance and the reception of the ultrasonic signals which may be reflected by the wall. The space of predetermined thickn...

A dirigible drilling head is provided with a hydraulic pulser in its rotating inner tube in the form of a spindle piston which can obstruct the flushing medium passage and is displaced by a hydraulic circuit including a hydraulic valve. The hydraulic valve is in turn actuated by a miniature electronic circuit so that a variety of input parameters from respective sensors can be delivered to the cir...

Fire retardant polystyrene insulating material is manufactured from expandable polystyrene beads in admixture with a phenol-formaldehyde or melamine-formaldehyde resin in resole form, the resin containing a blowing agent and a surfactant. The insulating material is formed from the bead-resin mix by applying dielectric heating to foam the resin, expand the beads, and cure the foamed resin to a clos...

A method for manufacturing a low density rubber foamed body is provided which comprises the steps of forming a sheet from a mixture of 100 parts by weight of natural rubber or a synthetic rubber, 10 to 80 parts by weight of a foaming agent, and 0.5 to 15% by weight of a crosslinking agent; enclosing said sheet within a mold and heating said mold under pressure from the exterior to thereby foam sai...

A moisture vapor transmitting elastomeric film which comprises a blend of incompatible polymers and contains voids characterized in that the blend comprises a continuous matrix of ethylene vinyl acetate within which the incompatible polymer forms a discrete particulate phase matrix, processes for the preparation thereof and articles comprising these films are described.

In producing a foam by foaming a melt-plasticized styrene/maleic anhydride copolymer resin, a process for producing a highly foamed styrene/maleic anhydride copolymer resin foam characterized by using as the blowing agent at least one compound selected from the group consisting of a carboxylate of a metal of group Ia of the periodic table of elements, a carbonate of a metal of group Ia, a carboxyl...

Substantially non-crosslinked polypropylene foamed particles having a bulk density of from 8 to 100 g/l and a particle diameter of from 1 to 5 mm and containing an organic sodium phosphate represented by the formula: +TR

A semisintered polytetrafluoroethylene article which is prepared by heating an unsintered polytetrafluoroethylene article at a temperature of at least the melting point of a sintered polymer, the article having an endothermic curve at a temperature of 345+/-5 DEG C. on a crystalline melting chart measured with a differential scanning carolimeter and a crystalline conversion of from 0.10 to 0.85 de...

An adhesive for adhering fibrous materials, particularly polyester fibrous material to rubber is disclosed, which comprises polyhydric phenol-polysulfides, resorcin excess resorcin-formaldehyde condensates, and RFL solution composed of resorcin-formaldehyde condensate and rubber latex.

A non-opaque coated polycarbonate shaped article, and a process for producing the same, having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate having thereon (i) a primer layer comprised of a thermoplastic acrylic polymer containing functional groups; and (ii) a top coat containing a thermoset organopolysiloxane on said primer layer. The process for producing...

A process, and the article produced thereby, for providing a uniformly and tenaciously adhered abrasion resistant and chemical resistant non-opaque coating on polycarbonate articles. The process comprises priming the surface of the polycarbonate article with an adhesion promoting thermoplastic acrylic polymer by forming a thin film of said thermoplastic acrylic polymer on the surface of the polyca...

A coated polycarbonate article, and a process for producing said article, having improved abrasion and chemical solvent resistance comprising a polycarbonate substrate having deposited thereon (i) a primer layer comprised of a thermoplastic acrylic polymer; and (ii) a top coat containing a thermoset organopolysiloxane disposed on said primer layer. The process for producing said coated polycarbona...