Abstract: The top edge portions of a ski of plastic material are produced in a two-part mold by placing the bottom surface sheet and edge portions of the ski on the floor of the mold while preformed top edge portions carry the top surface sheet and are supported in the mold by an auxiliary strip which extends outwardly from its side surface and rests on two opposite walls of the mold box. The auxiliary strips are held in place by magnets lodged in the opposite mold walls while the mold is open. After closing the mold with the mold lid a plastic foam material in the mold is expanded to produce the ski core and bond together the top and bottom surface sheets and edge portions of the ski. The auxiliary strips are severed from the top edge portions to finish the ski.

Abstract: A wire rod coiler for large bundles or coils has a vertically displaceable coiler plate and support structures outwardly limiting the coiling or reeling space. Each support structure guides a flexible member, such as an endless link chain, which is in driven engagement with the coiler plate and which in operation supports outer windings of a bundle or coil being produced to prevent such windings from adhering to the support structures.

Abstract: A rolling mill frame has a stand which is pivotal, preferably about a lower horizontal shaft, in order that the roll set together with accessory devices can be removed from the frame in a lateral direction without regard to the width of the window opening in the stand, for the purpose of interchange with a new roll set together with accessory devices thereof.

Abstract: A two-stroke internal combustion engine which comprises two rocking pistons disposed on opposite sides of a separating element that separates two pump chambers from each other. The pump chambers are located on the back side of the rocking pistons, and a hollow rotary slide is mounted in the separating element to positively control the intake and precompression phases of the pump chambers.

Abstract: A device for supporting an elongated light fixture on a drawing board mounted for pivoting and sliding movement on the support arm of a bracket by means of spaced bearings secured to the fixture. The bracket is mounted on the back side of the drawing board to effect the required movements for selectively positioning the support arm with the light fixture relative to the work surface of the drawing board.

Abstract: A collecting device used in co-operation with a vertically displaceable centering mandrel for forming long coils from a given length of wire rod supplied in the form of overlapping non-concentric windings to a collecting space in the device comprises oppositely disposed interceptor arms which can be pivoted into the collecting space to intercept and temporarily store initial ones of the wire rod windings supplied to the space. Additionally oppositely disposed pivotal arms provided with part-conical members are arranged to be rotated into the collecting space in such manner that the part-conical members together form a centering cone for guiding and centring the initial windings and for accommodating the top of the centering mandrel.

Abstract: A dialysis apparatus for purifying a fluid substance, particularly blood, containing contaminants which are diffused through semi-permeable diaphragms into a purification liquid. The apparatus comprises first plates having planar surfaces respectively disposed between opposing second plates provided with bosses on the surfaces facing the planar surfaces of the first plates. A plurality of these plates is alternately assembled into a stack with a diaphragm arranged between the opposite surfaces of the first and second plates. Portions of the clamped diaphragm are forced between the bosses of the second plates a predetermined distance to define two channels for the circulation of the two fluids.

Abstract: In hot strip rolling apparatus a driving roll stand is located between a rolling stand for producing the hot strip and a strip take-up reel. The driving roll stand comprises a pair of rolls capable of axial floating movement during take-up of the strip on said reel. A control system provides that the pair of rolls are locked axially when the strip tension between the rolling stand and the pair of rolls ceases.

Abstract: A trailer is provided with a self-lifting platform and comprises a vertical mast having vertical lifting supports spaced in the longitudinal direction of the trailer. Each lifting support carries a toothed rack and symmetrical independent lifting mechanisms for actuating roller stars which are in engagement with the rack teeth.

Abstract: A process for producing hollow pastries wherein a strip of pastry dough is wound off a rotary drum on a winding spindle disposed relative to the drum to produce a hollow pastry body by spirally overlapping the pastry strip on the spindle. A coating is applied on the inside of the pastry strip from a dispending nozzle before the strip is wound on the spindle to protect the pastry body from the wet filling introduced subsequently into the hollow pastry body and to bond the overlapping turns of the pastry body to each other.

Abstract: A lottery ticket which consists of a continuous strip of sheet material is perforated along predetermined lines and folded to provide a three-layer ticket in which the lottery number is placed on the bottom layer. The perforations are disposed in the two upper layers and define areas that can be readily broken to form lug portions. The ticket number on the bottom layer can be revealed only by pulling on the lug portions which will tear off along the perforated lines. In this manner the ticket is permanently and irreparably altered.