Showing papers on "Stamping published in 1970"

Method of manufacturing electrical terminals

Abstract: Electrical terminals are manufactured by stamping, from sheet metal stock, a blank for the terminal, forming a hole in the blank which is spaced from an edge of the blank, and driving a punch through the hole in a manner such that the surface portions of the blank which separate the hole from the edge are reoriented so that they extend transversely of the plane of the blank. These surface portions are utilized as the contact surfaces of the terminal and are substantially greater than the surface area available for contact purposes on the edge of the blank.

Composite ceramic articles

Abstract: Dense monolithic bodies having complex internal cavities or passageways are made from sinterable powders by mixing the sinterable powders with an organic film-forming resin, forming a tape from the resin, cutting or stamping a multiplicity of disks, plates or chips from the tape which have the peripheral dimensions of the object to be made, stamping or cutting holes in the disks according to a predetermined pattern, laminating the disks to provide an object with the desired internal structure, and finally heat treating to remove the resin binder and sintering the powdered particles together to form a monolithic structure.

A method of manufacture of printed circuits by die stamping

Abstract: The manufacture of a printed circuit comprises arranging an adhesive-free, electrically conductive sheet in overlying relation with a non-conductive backing sheet coated with a dry, thermoplastic adhesive. A heated die having contours conforming generally to the configuration of conductive circuit elements to be bonded to the backing engages the conductive sheet and fuses the circuit elements to the backing sheet. The overlying sheets then are indexed to a cutting station at which the sheets are supported on a hard, flat base and a cutting die having cutting edges corresponding to the marginal outlines of the circuit elements is dropped onto the overlying sheets to cut the circuit elements from the conductive sheet. The cutting edges of the cutting die project from the lands they surround a distance greater than the thickness of the conductive sheet, but less than the combined thickness of the conductive sheet, the backing sheet, and the adhesive coating so that the backing sheet is neither cut nor permanently deformed. Following the cutting operation the conductive sheet from which the circuit elements have been cut is removed and an overlay sheet of insulation is applied over the circuit elements and bonded to the latter and to the backing sheet.

Arrangement of two or more automatically operating punching machines in form of a cooperating machine set

Abstract: An arrangement of at least two automatically operated stamping machines in the style of a cooperating machine set, which comprises a plurality of stamping machines disposed in one line and spaced apart equally from each other. A plurality of sheet supporting tables is disposed at a unitary level and a rotatable table is releasably inserted between each pair of adjacent of the stamping machines. The transfer tables connect a workpiece depositing station of each of the machines with a feeding station of the next following of the machines. The stamping machines comprise notching presses for the production of dynamo sheets for electromachines and disposed in series, and a separating press is disposed at the end of the row of the machines, the separating press dislocating said sheets combined during the passage of the preset notching presses into stator- and rotor-sheets and depositing the same separately.

Adjustable roll feed

Abstract: An adjustable roll feed for stamping presses and the like for imparting intermittent linear feed to strip stock, said feed having first adjustment means for permitting the length of feed per revolution of the rolls to be adjusted between zero and a maximum length based on the diameter of the rolls and having a second adjustment means permitting a fine adjustment of the length of feed to be effected while the feed is in operation.

Electric network and method of making same

Abstract: An electrical network has a carrier-free, self-supporting grid system prefabricated in one piece of an electrically conductive material. The grid system defines a plurality of electrically conductive paths. A predetermined number of various electrical components are mounted on the grid system in predetermined locations, and predetermined ones of the defined conductive paths are severed. The self-supporting grid system may be constructed as a continuous tape and cut to the desired size; and the predetermined paths may be severed by stamping or cutting.

Ring-pull can lid mfr. with lacquer protection - by embossing tear lines lacquering sheet, then stamping lids out

Abstract: Ring-pull can lids are mfrd from sheet metal by stamping from a plate with a protective layer The embossed lines for lids are produced in a common sheet metal strip or panel The surface protective layer(s) are then applied to one or both sides eg by lacquering with rollers, and the lids are stamped out Pref to receive the material displaced during embossing, corrugations are produced near the embossed lines The protective layer may also be tin The thicker protective layer is toward the contents of the can, while the other side may be unlacquered or have a thinner coat

A method of forming a stack of laminations

Abstract: 1,200,279 Laminating metal sheets; jointing; shearing H LEUENBERGER 16 Dec, 1968 [29 Dec, 1967], No 59640/68 Headings B3A, B3J, B3V and B3W A method of laminating sheets comprises laying a plain sheet on an underlying sheet 2 having at least one indentation 3 formed therein and using the indentation as a die to form a further indentation in the plane sheet, which further indentation mates with the indentation in the underlying sheet to connect the sheets together The laminations are of iron and their surfaces are electrically insulated, the stacks of laminations forming magnetic cores for choke coils or transformers The bottom sheet is punched out initially and the indentations are stamped by a male and female die The second lamination is punched out and placed on the bottom lamination, which acts as a female die for the second lamination, the original male die being used again The process is repeated until the stack comprises the required number of laminations Alternatively the punching and stamping operations may be performed simultaneously The indentations are alternatively in the shape of a symmetrical trapezium with an open base, Fig 5 (not shown), and they may be formed in the sheet edges The stacks of laminations may also be used for stators and rotors of dynamo-electric machines

Hollow bearing ball and process for making them

Abstract: A hollow bearing ball formed from a relatively resilient steel by initially stamping a round blank from a strip, drawing the blank, and forging and flowing the drawn blank of metal to subsequently form a substantially hemispherical portion of a hollow bearing ball. The hemispherical portions are fed into a hopper which serve to place them in opposed concave relationship after which they are interposed within and between two electrode welding seats which hold the hemispherical portions under pressure and weld them to form a hollow bearing ball.

Factors affecting the depth of draw in a cold-forming operation

Abstract: Stamping of a flat sheet into a hollow, seamless item involves tensile, frictional, bending, and compressive effects. A quantitative analysis of stresses developed in the sheet during such a “deep drawing” operation is presented indicating that the maximum depth of draw depends on the ratio of tensile stress and compressive yield stress in the plane of the sheet. Several materials are examined and their performance in deep drawing analyzed in terms of proposed criteria for deep drawing. Techniques are discussed which can be used to increase the depth of draw of polymeric material.

Devices for Heating Food Contained in Coded Packages.

Abstract: 1,180,958. Electric heating. P. TANGUY, P. CARRE, and J. LE BOULBOUECH. 14 Dec., 1967, [15 Dec., 1966], No. 56878/67. Heading H5H. [Also in Divisions G3, H1] A device for heating food contained in packages is automatically controlled in response to the reading of coded irregularities on the surface of the package. A coded food package, Fig. 1, comprises a bottom 1 and a cover 2. The edges of the bottom on which the cover is glued are cut away as shown, a jag 4 determining the heating time and jags 3, 5 set the intensity of heating and control of other apparatus connected with the heating. The coding may also be effected by recessing the bottom or, for cans where indentations are formed to compensate for the partial vacuum created during sterilization, by additional coding indentations formed during stamping. As shown, Fig. 6, a package 12 is introduced into an oven on a support 13 between infra-red emitting elements 14, 15. The oven shell 16 is insulated by glass-wool. The package is introduced into the oven through an insulated door 18, locked by an electromagnet, having a pressure blade 19 retaining the package in place. Each line of indentations on the package 12 is sensed by a feeler 22, pivoted about a shaft 24 and loaded by a spring 25, the tension of which is adjusted by a cross-piece 26 cooperating with a variable stop 27. An end 28 of the feeler 22 bears on an adjustable rod 29 which exerts a load, when the feeler is not engaging an indentation, on a switch 30 controlling resistances 32. The resistances are placed in series when the feeler engages an indentation and are placed in parallel when it does not. The resistances 32, through a capacitive circuit, determine the time of heating of the coded package. The feelers are arranged along the shaft 24 and through a linkage operated by the package, Figs. 7-9 (not shown), are lowered during insertion of the package and only touch the bottom of the package when it is in the stop position. Current for pre-heating the oven is determined by a contact inserting, through an electromagnetic relay, resistances in the capacitive circuit, a lamp being energized on release of the relay to denote the oven is ready for operation. At the end of a heating cycle the door 19 opens, on release of the electromagnetic lock, by the pressure of a bar 39 on the package. In another embodiment, a package, coded as in Fig. 1, is positioned between a pair of highfrequency electrodes, the lower one of which is positionable in dependance on the length of a jag to vary the intensity of heating. Additional feelers, responsive to the package code, are stated to modify the programme of a device for making pancakes. In a further embodiment, the door is retained by an electromagnet against the pressure of a spring, which, when the electromagnet is deenergized, opens the door and ejects the package.

Circular saw manufacturing procedure

Abstract: Circular saw manufacturing procedure by pressing, stamping or rolling where the knife is of a stainless material, such as steel plate, with a completely-, or partly- covering film of Teflon or a material with similar properties.

Housing and mount for air moving apparatus

Abstract: A novel improved housing for blowers and method of assembly therefor is made possible by forming a housing which is characterized by its having a uniform cross section, being formed of a single extruded body of aluminum, and being so formed as to receive end plates which can be screwed thereto, the end plates being of a shape to match the semi-involute form of the housing, thereby to make it possible to assemble a housing for a blower consisting of the three pieces, and the method comprising the steps involved in extruding the body stamping the endpieces and assembling the whole.

Improvements in or relating to Studs

Abstract: 1,181,655. Making studs. K. E. STANLEY. 15 Feb., 1967 [15 Feb., 1966], No. 6672/66. Heading B3A. [Also in Division F2] A stud comprises a shank 4 swaged from a metal sheet so that an annular portion 5 encircles the shank 4, the annular portion forming a head for the stud, being provided with holes 1, 2, 3 and being embedded in plastics material. The shank may be provided with an external or internal thread 6 and the holes 1, 2, 3 may be circular and formed in the portion 5 in concentric rings. The stud may be formed by stamping a disc from a metal sheet, cutting the holes 1, 2, 3 in the disc, swaging, in a plurality of operations, the shank 4 from the disc and then forming, if desired, the thread on the shank.

Computer-controlled automatic mach. for prodn. of stamped sheet - for the electric transformer and motor industries

Abstract: The machine comprises a feeding mechanism, a stamping press equipped with a stamping die with several punches which can be shifted into position either singly or together by means of a lever without the need of arrest the driving motor during the feeding and removal cycles. There is also a receptacle for the finished pieces of stamped out metal sheet. The latter is constructed so as to be capable to collect a predetermined number of sheets which may be sprayed automatically before hand with a suitable substance and then compressed and if necessary heated up to effect during and formed into finished cores.

A Bearing Bush for Ball and Socket Joints

Abstract: 1,181,686. Bearing bushes. KARL SCHMIDT G.m.b.H. 13 April, 1967 [16 April, 1966; 2 Nov., 1966], No. 17048/67. Heading E2F. Bearing bushes for ball and socket joints are made by providing a sheet of material, making at least one incision in the sheet which completely penetrates the thickness of the sheet so as to form a blank, the or each incision being such that where the blank is bent to form the bearing bush the thickness of the blank does not change, and bending the blank to the required cup-like shape without changing the wall thickness of the blank. Typical blanks are shown in Figs. 4, 13 and 17. As shown in Fig. 9a, the sheet of material may be incised along a jagged line so that two blanks are formed so as to reduce wastage of the material. The bearing surfaces of the bush may be provided with a bearing material, e.g. plastic or metal. The blank may be formed by a stamping operation.

Ram-operated Tools having Opposed Co-acting Jaws

Abstract: 1,184,470 Shearing; stamping S N HOARE 5 May, 1967 [6 May, 1966], No 20270/66 Headings B3Q and B3W A portable tool unit comprises a fluidpressure actuated ram 1 and a tool housing 5 attached to the body of the ram but leaving at least the major part of the body unobstructed, the tool comprising pivotally coupled jawcarrying members 6, 7, the member 6 being fixed to the housing and the member 7 being operatively connected to a plunger 11 of the ram so as to be pivoted thereby, and only the jaw portions 6a, 7a of the tool projecting from the housing The tail portion 7b is slotted to receive an extension 13 screwed to the plunger 11 and is retained between shoulders 14 and a cross-pin 15 A control member 16 is connected to the shank 17 of a fluid-pressure supply valve, a supply line being connected to the ram body at 18 In another embodiment, (not shown), for two-hand manipulation a control trigger is carried on a flat sided lower extension of the ram body Jaw portions for shearing, pinching, clenching or rivetting may be provided

Adjustable stamping press stock guide

Abstract: A stock guide for feeding stock to the die of a stamping press. The guide has a base member adjustably mounted on the anvil of the press adjacent to the stamping die and a guide table mounted for vertical adjustment on the base member, with an aligning bar adjustably mounted on the table.

Stamping mass for metallurgical furnaces

Abstract: A refractory stamping mass wherein essentially sand or dolomite and carbon from coal or coke and a binding agent is used for metallurgical furnaces, the improvement which consists in the addition of a phenoplast precondensate.

Electrically operated marking device

Abstract: Marking device with settable characters electrically operated for stamping preset characters on the articles to be marked. A switch for operating the device is actuated upon placing the marking device on the article to be marked.

Stressed metal surfaces protection during forming - using polymer adhesive coating compsn

Abstract: Metals under stress during pressing, rolling, stamping, drawing etc. are coated with (mixed) vinyl chloride/vinyl acetate polymer containing added adhesive. Treatment obviates need to grind and polish surfaces after forming.

An improved ratchet wrench

Abstract: 1,208,036. Ratchet wrenches. METALLIFACTURE Ltd. 24 April, 1969 [24 May, 1968], No. 24802/68. Heading B3N. A ratchet wrench comprises two interfitting handle parts 1, 2 formed by metal pressing or stamping, and a pawl and ratchet 4, 3 located in between the parts.

Improvements in and relating to Presses

Abstract: 1,179,872 Stamping MASTABAR MINING EQUIPMENT CO Ltd 21 March, 1968 [23 March, 1967], No 13705/67 Heading B3Q A portable press comprises a stationary jaw mounting member 18, means 10 for closing a movable jaw 16 towards the member 18, and rigid spacing means 20, 22 extending between and holding the member 18 and the closing means 10 in spaced relationship As shown, the detachable jaw 16 forces the end fitting 102 of a hose 100 through the tapered bore of a split die 24 to contract the fitting about the hose-end A ram 14 for moving the jaw 16 against a return spring 52, Fig 2, is slidable on a mounting bolt which carries an abutment for one end of the spring 52, the other end engaging an end of the ram A screwed cap 44 closes the forward end of the ram Hydraulic fluid from a reservoir 12 is supplied to the ram by a plunger 56 operated by a hand lever 26 Part of the member 18 may be pivotally and/or detachably mounted, Fig 3 (not shown), so that the die 24 may be opened for lateral insertion of the hose The hose fitting 102 may have internal grooves in the sleeve part and external grooves in the spigot part In a modification (not shown), the top plate 22 is replaced by a set of rods

Improvements in the manufacture of light-weight containers.

Abstract: 1,209,302. Shaping sheet materials. A. N. GOODMAN. 26 Oct., 1969 [26 July, 1966], No. 33665/66. Heading B6J. Light-weight cases are formed by cutting blanks from a flat sheet of material, pressing each blank between a stamper member and a die, and depositing each case so formed through the die on to conveyer means forming part of a production line in which the cases are used. The invention is particularly suitable for stamping crimped baking cases from a continuous sheet of greaseproof paper or foil laminate, the cases being deposited directly on to an oven sheet which is conveyed through a filling station to the oven. Fig. 1 illustrates apparatus in which a blank 24 has been cut from continuous sheet 16 by a rotary cutter 12, which is subsequently retracted from the cutting table 14. A stamper member 18 forces blank 24 through a hole 22 in table 14 into die 20, Fig. 2 (not shown); the stamper 18 is formed of a truncated cone 34 and a pusher 36, and the cone 34 is also partially retracted, while the pusher 36 deposits the case (30), Fig. 3 (not shown), into a recess 28 of an oven sheet 26 carried on an intermittent conveyer 32. The complete stamper member 18 then returns to its initial position, and the sheet 16 is fed forwards again. A number of such stamping units may be mounted side-by-side to operate simultaneously across an oven sheet, Fig. 4 (not shown). The stamper and the die may be heated. Rotary cutter 12, cone 34 and plunger 36 are generally mounted on hollow concentric shafts connected to camshafts or crank-shafts which control their operating cycles independently (not shown). The die 20 is normally open-ended, but may, alternatively, have a closed lower end which is moved aside to allow each case to be deposited below the die. The die may also be split into sections which could be opened up for use with non-resilient cases.

Stamping input and output media from plastic - film

Abstract: Stamping is performed by a press moulding machine using a stamping die as the negative mould heat and pressure being applied. First thermoplastic film is stamped under high pressure in the cold state and heat is then applied via the dies. The heat and pressure cause fluted modulations to appear in the plastic material and these are frozen-in by withdrawal of the heat.

A machine for producing and applying metal clips

Abstract: 1,208,204. Making metal clips; angular bending; jointing by stamping; shearing. J. M. DAVIS. 3 April, 1969 [4 April, 1968], No. 16364/68. Headings B3A, B3E, B3Q and B3W. A device for forming and applying U-shaped clips or other fastening means formed by severing and bending strip metal material includes a reciprocating punch 18, a rotary member 20 having a chamber 19 extending transversely to the rotational axis thereof, the member being arranged so that in two positions at 180 degrees to one another the chamber is disposed to receive the punch, means for feeding the strip material stepwise, the arrangement being such that each fastening means is formed and applied by two consecutive working strokes of the punch, a portion of the strip first being detached and driven into the chamber, then formed into a U-shape extending yoke first into the chamber, and finally driven prongs first from the chamber by means of the yoke of the next formed fastening means. Two wires to be joined are inserted between open jaws 21. Levers 22 are depressed, pivoting the jaws about pins 23, which action moves rollers 24 apart and a heel 21A operates an air valve 25 to actuate an operating cycle. A ram 26 is driven upwardly and a cam surface 41 pivots an arm 36 thereby advancing a carrier head 12. As the head 12 advances, jaws 12A, 12B close on the steel strip material to advance it one step. A further cam surface 34 engages a roller 33 to pivot toggle arms 27, 28, thereby driving a cutter 16 upwardly. The cutter, which reciprocates through a very short stroke adjustable by tapered wedges 30, produces a generally U- shaped cut in the strip almost, but not completely, through the thickness thereof. The previously formed clip blank having been advanced over a die 17 is engaged by the punch 18, formed into a U-shape and forced into the chamber 19. As the clip already in the chamber is pushed out, its prongs engage the jaws 2] and they are crimped around the wires. On the return stroke of the ram 26 a ratchet connection of a rack and pinion drive rotates the member 20 through 180 degrees after the punch is clear of the chamber 19, Fig. 7 (not shown). As the member 20 rotates, two flats on its periphery nudge the jaws partially open and a spring in the valve 25 and a further spring 25A open them fully. The cam surfaces 34, 41 withdraw the punch 16 and the head 12 respectively, the jaws 12A, 12B on the latter moving apart to release their grip on the strip. The length of the feed step of the steel strip is governed by the distance between a fixed stop (50) and an adjustable stop (51), Fig. 2 (not shown). Adjustment of the stop (51) simultaneously adjusts the position of the cutter 16 and its die 13.

Process for Pressure-Forging Thickenings on Pipe Ends

Abstract: 1,177,017. Upsetting pipe ends; stamping. H. HERTEL. 24 April, 1967 [14 May, 1966], No. 18821/67. Headings B3H and B3Q. The end of a pipe 2 is hot or cold upset by clamping the pipe at 3, enclosing the projecting pipe end in a die 1 and whilst the bore of the pipe is unrestricted, upsetting the end by a punch 4 inserted into the die. The pipe wall is thus thickened internally, Fig. 2 (not shown). Percussive impact forces, such as by explosive pressure, are applied to the hollow punch 4. The pipe may be disposed vertically or horizontally during upsetting. After upsetting the original internal diameter of the pipe may be restored by expanding it in a die by hydraulic or explosive pressure or by an internal plug. During this operation external threads may be formed.

Stamping of grooves in an information carrier of therm- - oplastic sheet

Abstract: The film is supported over a negative mould while a gaseous pressure agent is used in a positive or press mould the required pressure and temperature being produced by a combustion process in the press mould itself.