Locating a tacky polymer-coated steel sheet on a magnetic rubber-covered glass support by sliding the support out from under a shield and carrying the steel sheet with the magnetic support gradually to place the sheet on the support.

Sets of blocks, each set being a plurality of similarly shaped polyhedrons having faces of at least two different polygonal shapes. A set may consist of truncated octahedrons, of pentagonal prisms or of dodecahedrons. Magnetic or other means are provided in the faces so that matching faces may be joined and the blocks of a set built up in a large variety of close packing arrays without overlapping or interstices between the blocks. The blocks may be solid or hollow and may be coated with metalli...

Apparatus for the head-to-tail stacking of objects or groups of objects, such as folded cardboard packaging boxes, which are substantially identical in terms of their shapes, their dimensions and the orientation with which they are presented to the apparatus. The apparatus includes an aligning and retaining device which is mounted on a shaft extending above and transversely with respect to a conveyor. The aligning and retaining device is arranged to remove and invert a first batch of objects at ...

Three-dimensional objects are produced by the polymerization of a photopolymerizable liquid medium with the aid of high-energy radiation by continuously introducing the liquid medium in lamina form from a casting means onto the surface of a carrier liquid which has a higher specific gravity than the photopolymerizable medium and is not miscible therewith. This lamina is polymerized by irradiation to form a laminar, two-dimensional polymer layer, then the surface of the carrier liquid is raised a...

Bundling of objects using a harnessing device with a locking head and a strap with teeth that are controlled by stretching. The locking head contains a pawl or tang that engages the teeth of the strap by wedging. A wedging tooth is desirably on the locking tang as well, and a further tooth to promote locking is desirably included in the locking head. The strap is advantageously molded of stretch reorientable material which is subsequently stretched to control the profile of the teeth which are e...

A positioner for objects such as car couplers undergoing repair welding which includes a vertically movable carriage, a longitudinal shaft and bearing supported on the carriage, the longitudinal bearing being adjustable angularly with respect to the carriage, a lateral bearing supported on the longitudinal bearing, a shaft journaled in the lateral bearing, the lateral bearing shaft being angularly adjustable with respect to the lateral bearing, and a clamp for the object mounted on the lateral b...

Bundling of objects using a harnessing device with a locking head and a strap with teeth that are controlled by stretching. The locking head contains a pawl or tang that engages the teeth of the strap by wedging. One or more wedging teeth are desirably located on the locking tang as well. A further tooth to promote locking is desirably included in the locking head. The strap is advantageously molded of stretch reorientable material which is subsequently stretched to control the profile of the te...

A locating system 10 for locating predetermined labelled objects 20 includes a transceiver unit 12 which comprises a narrow beamwidth antenna 14 for transmitting an energizing signal 16 at a predetermined first frequency and for receiving a returned signal 22 at a predetermined second frequency from an object to be located, the energizing signal 16 incorporating a predetermined transponder category code. A plurality of label-like transponders 18 is provided, each of which is affixable to an obje...

A longitudinally extending, or extendable, member is pivotally positioned by being snapped into a housing. The member includes a recess by which the member is snapped into the housing. A protuberance at the pivot position facilitates the pivoting of the member outwardly from the housing into position for receiving an item that is to be suspended by the member. In accordance with one aspect of the invention, the housing is a frame with a rectangular opening and opposed protuberances for receiving...

Bundling of objects using a harnessing device with a locking head and a strap with teeth that are controlled by stretching. The locking head contains a pawl or tang that engages the teeth of the strap by wedging. A wedging tooth is desirably on the locking tang as well, and a further tooth to promote locking is desirably included in the locking head. The strap is advantageously molded of stretch reorientable material which is subsequently stretched to control the profile of the teeth which are e...