Abstract: A pair of cutter blades is provided for cutting sheet metal in flat tubular form. The blades are pivotally connected together in scissors-fashion so as to be capable of relative movement between each other. At least one of the blades is formed with a cutting edge comprising a piercing point or region having on each side portions which trail the leading extremity of the piercing point or region considered in the direction of cutting, whereby in operation after initial piercing of the metal to be cut, and on continued cutting, the incision made by the piercing point or region increases away from the pierced region towards the sides of the material being cut. The blades may be operated by means of a piston and cylinder device driving a pair of links connecting the piston to the two blades at positions off-set from the pivotal axis of the two blades.

Abstract: A refined reactive gas is obtained by repeating more than once a step of liquefying a reactive gas and gasifying the liquefied gas in a liquefying and gasifying receptacle. Prior to the liquefaction-gasification step, cleaning treatment of the liquefying and gasifying receptacle thereinto hydrogen and then evacuating the receptacle.

Abstract: A drum for separation of a bulk material into a heavier and a lighter fraction is arranged to be rotated around its central axis at a certain velocity and to be traversed by a flow of air at a certain flow velocity. The drum has at least one discharge aperture for the heavier fraction and at least one discharge aperture for the lighter fraction further on in the drum in the direction of the air flow.

Abstract: The invention provides a new structure for a subsurface junction field effect transistor (SJFET) and a new process for its fabrication, the process being especially compatible with existing processes for the fabrication of bipolar devices. Spaced zones of p.sup.+ type are diffused into an n-type epitaxial layer to terminate the channel and connect to source and drain terminals. Spaced zones of n.sup.+ type are diffused into the epitaxial layer to define the channel width. The corresponding zones for the bipolar device can be formed at the same time. A passivating layer of silicon dioxide is applied and the subsurface p-type channel formed by ion implantation to leave a thin n-type layer between the channel and the silicon dioxide layer. Upon application of a metal layer over the silicon dioxide layer in the neighborhood of the channel, and its connection to the back gate terminal, a stable electron accumulation layer forms at the surface of the n-type layer which interfaces with the silicon dioxide layer.

Abstract: In a firearm with a cylinder bolt mechanism, a locking chamber (27) is arranged in a space in the barrel between the rear end of the barrel and the rear end of the cartridge chamber for a bolt tip (28) on the bolt. Behind the locking chamber in the barrel is arranged a separate locking ring (23) between a stop (25) in the receiver and the rear end of the barrel. The locking ring is provided with lugs and grooves, and the bolt head is provided with corresponding claws which are able to pass through the grooves in the locking ring and to be rotated into the locked position ahead of the lugs in the ring. By introducing the bolt complete with the bolt head into the barrel and locking it securely in this position, it is possible to achieve greater accuracy because the bolt head acts as a stiffening connection between the barrel and the receiver, so that these components of the firearm are unable to move relative to each other as the result of oscillations in the barrel when the cartridge detonates.

Abstract: The surface of a flexible magnetic recording medium is continuously smoothed between at least one set of two rolls at least one of which is a metal roll. The rolls serve as electrodes of a high-frequency dielectric heater. A refrigerant is fed to the electrodes, and a high frequency is applied to the electrodes while the recording medium is passed and pressed between the rolls.

Abstract: A radiation image storage panel having a phosphor layer comprising a binder and a stimulable phosphor dispersed therein, in which said stimulable phosphor has such a particle size distribution that phosphor particles having a diameter of not less than 100 .mu.m are present in an amount of not more than 1% by weight and phosphor particles having a diameter of not less than 1 .mu.m are present in an amount of not less than 50% by weight. The panel shows high sensitivity and good image characteristics.

Abstract: The specification discloses an article retention system for transfrer equipment, particularly transfer equipment for carrying can ends to a series of stations to produce an easy-opening end. The can ends are supported by an indexing belt and contact means in the form of spring steel strips and are arranged in overlying and contacting relationship with the can ends supported by the belt. A contacting force of between 200 to 500 grams is sufficient to retain the can ends in a predetermined orientation such that the ends are accurately presented to each station. In an alternative embodiment a fixed rail overlies the edges of the can ends and spring loaded rollers engage the indexing belt to force the can ends into engagement with the rails to maintain the orientation in a manner similar to the above.

Abstract: A copolymer of an acrylic acid derivative and an other copolymerizable monomer, the acrylic acid derivative being a compound represented by the formula (1) ##STR1## wherein Rf and Rf' are respectively perfluoroalkyl group having 3 to 21 carbon atoms, a is an integer of 2 to 10, b is an integer of 1 to 10.

Abstract: A device for heating the bitumen layer of rolled roofing material in such a way that said layer becomes soft and sticky enough to adhere to the surface to be covered without burning said layer, comprising a distributing pipe (19) with many small closely distributed burner nozzles (20) for a combustible gas placed inside an elongated boxlike casing (9). The burner nozzles (20) form a row (10) inside the casing which is open at the front and rear. The plates (13, 14) and its width is considerably greater than its height while its length is considerably greater than its width. The distributing pipe (19) runs between the gable plates (13, 14) and is so positioned between and parallel to the top and the bottom plates that air slits (21, 22) are formed between the pipe and the top (11) and bottom (12) plates, respectively, said slits admitting air from the rear (17) of the casing to the nozzles (20).

Abstract: A solid-state color imaging device carrying a micro-color filter which is reduced in its alkali metal ion content to a level of not more than 100 ppm is prepared through formation of a substrate of at least one colored resin layer of the micro-color filter using, as the substrate material, a water-soluble protein such as gelatin whose alkali metal ion content is not more than 20 ppm.

Abstract: A photo-sensor, such as a photo-diode, is applied to the converging area of a flat type light transmission unit in an image read-out system, thereby intercepting a part of the scan light which falls on and travels through the light transmission unit after being reflected from an image-bearing sheet. The output signal from the photo-sensor can be advantageously used to detect arrival of the sheet edge at the scanning station, any scratches on the sheet and other operating conditions as required.

Abstract: An imprinter for use with a credit card having fluorescent markings thereon, the imprinter comprising a substantially rectangular bed, a credit card holder for holding the credit card on the bed, a document holder for holding a document on the bed in partially overlapping relationship with the credit card, a carriage containing a print roller for passage over the credit card and document to imprint data from the credit card on the document, an aperture receivable of a credit card formed through said bed and guide means for holding a credit card inserted through the aperture in a predetermined orientation beneath the bed. A credit card validation system is disposed beneath the bed of the imprinter.

Abstract: An improved intake system in an internal combustion engine of a high compression ratio capable of producing a swirl of air-fuel mixture so as to increase the combustion speed thereof for improved combustion efficiency and hence fuel economy during light-load operation of the engine, and at the same time of effectively suppressing the generation of a swirl so as to reduce the level of combustion noises to a substantial extent during heavy-load operation of the engine at full-open throttle. The engine has a combustion chamber defined in a recess in the cylinder head above the top of a piston, slidably received in a cylinder bore in the cylinder block, at its top dead-center, with a squish area of a limited clearance formed adjacent the combustion chamber in the cylinder bore between the cylinder head and the piston.

Abstract: An apparatus is described by which a label bearing tape can be transported intermittently in a manually operated labeler. The device contains a transporting carriage (19) reciprocable along the label bearing tape (5). In the carriage a latch (22) with a clamping face (25) is held in frictional engagement with the label bearing tape so that during movement of the carriage in one direction it freely slides on the label bearing tape, while during movement of the carriage in the other direction it clamps the label bearing tape against an abutment surface (26) with self-locking action. The clamping face of the latch is covered with abrasive paper, preferably with an aluminous abrasive paper.

Abstract: A roll stand for rolls of sheet material allowing exchange of rolls has been invented, wherein the full rolls may be entered into or removed from the roll stand sideways. The roll spindles (16, 17) are at one of their ends journalled stiffly in a first roll holder gable (14), while the other gable (15) comprises at least two supporting arms (26, 27) with supporting bearings (46, 47) for the other ends of the roll spindles. Means (33, 29, 44) are provided to individually loosen the supporting arms from the spindles and moving them aside to make possible the entry or removal of a full roll onto or from the exposed spindle making use of a carriage or the like.

Abstract: A heat-sensitive recording sheet is disclosed, comprising a base having thereon a heat-sensitive layer which contains, as main components, at least two kinds of fluoran dye color formers selected from different groups and a developer which causes coloration of the color former by heating. The color image of the heat-sensitive recording sheet fades less under influence of heat or humidity. Further the heat-sensitive recording sheet has high whiteness and less fogging of the background.

Abstract: A multi-layer semiconductor manufacturing method which employs a plurality of sequentially arranged, adjacent reaction chambers and a plurality of normally closed shutter means respectively separating the reaction chambers. The reaction chambers are each provided with a gas inlet and gas outlet where the reaction chambers each have positioned therein a substrate.

Abstract: In a radiation image recording system in which a radiation image is once recorded on a stimulable phosphor sheet and then read out and reproduced into a visible radiation image, a high-power light source is built in the system to erase the noise due to the previously stored radiation image and the fog in the phosphor sheet by a single erasing operation immediately before the phosphor sheet is to be used to record thereon a radiation image. The light source has an exposure amount of at least 500,000 1x.multidot.sec. and is positioned between a phosphor sheet feeding section and a section where a radiation image is recorded on the sheet. The system is also provided with a mechanism for sending the phosphor sheet from the recording section to a sheet receiver or radiation image read out and reproducing apparatus.

Abstract: In a radiation image recording system in which a radiation image is once recorded on a stimulable phosphor and then read out to reproduce a visible radiation image, at least one recording material formed of a phosphor layer and fixed on a supporting material is circulated and reused to record radiation images thereon. The system comprises a mechanism for circulating the recording material with respect to the image read-out section by repeatedly moving the supporting material and the image read-out section with respect to each other, and an erasing apparatus for eliminating the radiation energy remaining on the recording material after the read-out step. The supporting material is an endless belt, a rotatable drum or a plate, and the recording material is a continuous phosphor layer or a phosphor sheet.