Abstract: Apparatus for mounting and centering a wheel on a mounting spindle of a testing machine, including a shaft portion, a centering taper member on the shaft portion for engaging a center hole in a wheel to be mounted, a fixing nut which can be screwed on the shaft portion for pressing the wheel against the centering taper member for centering the wheel, a spring operable to urge the taper member towards the nut, a housing member on the shaft portion around a part of the spring, a covering means covering the spring for protection thereof, the covering means being disposed on the shaft portion and at least partly in the housing member, and means for limiting the movement of the spring towards a fully relaxed condition thereof thereby to maintain a pre-stressing in the spring.

Abstract: A transducing unit comprising a central section, detecting echoes returned through only a small portion of a relatively large aperture lens, surrounded by an annular section, detecting echoes returned through the remainder of the aperture, provides detected signals from the respective central and annular sections which are selectively utilized during respective specified time intervals in accordance with the operation of time-controlled switches to thereby change the effective depth of focus of the lens as a function of time.

Abstract: In apparatus for ultrasonic examination of an object, the echoes derived at successive positions of an ultrasonic transducer are digitized and subtracted one from the other. If the echoes are not the same, the difference is a discrete indication of a flaw. The invention applies especially to the detection of flaws close to the front surface of the object where the front surface echo tends to obscure nearby flaws.

Abstract: A semiconductor pressure converter includes a silicon pressure sensing element, a silicon base hermetically attached to the sensing element to bear the element and a metal pipe connected to the silicon base so as to introduce a pressure to the sensing element through the silicon base.

Abstract: The floating amplifier of a pressure gauge is mounted onto the free end of the Bourdon tube at various effective spacings therefrom correlated to offset any residual tip travel of the individual Bourdon tube.

Abstract: A swashplate drive in which the plate is tiltable between a minimum angle .alpha. and a maximum angle .alpha. and one or more drive rods each have a drive rod head with two spherical surfaces which are contacted by two sliding bodies, the other, flat side of the bodies engaging two running surfaces on the plate. The running surfaces are spaced apart a selected distance which minimizes variation in play between the plate, sliding bodies and drive rod head.

Abstract: Excursion mechanism for rotating a large rotating disc member having a column upstanding therefrom at an outer portion thereof, the column being permanently affixed thereto. The column supports an X-ray source and camera for radiographing a patient's dental arch area. The column circularly orbits about the patient seated in a patient chair which rests on a stationary platform disposed above the large rotating disc member. A sprocket is rotatably mounted on the rotating disc member. A belt articulates between the sprocket and the stationary patient platform such that rotation of the sprocket through external motor means causes the large rotating disc member and column to orbit the patient.

Abstract: A driving and driven sprocket and endless chain arrangement wherein the driven sprocket includes a first set of conventional involute teeth and a second set of modified teeth disposed in respective random patterns, and wherein the modified teeth have the flanks on the trailing sides thereof relieved a predetermined amount and the roots adjacent thereto formed on a diameter a predetermined amount larger than the root diameter of the first set of conventional teeth for improved noise reduction characteristics.

Abstract: In a remote-controlled rearview mirror, particularly for motor vehicles, the mirror is mounted by a convex swivel element resting in a concave seat forming one piece with the assembly base. The seating has a central opening allowing passage of a shank extending the swivel and which fits into a reducer box where it is immobilized. The reducer box has a center axis, on which a freely rotating center pinion is mounted, being integral with the control lever, and the outer part of the pinion being smooth and freely rotatable in the center of a planet wheel carrier element which serves as a bearing therefor and which constitutes a cover for the reducer box. The planet wheel carrier includes three perpendicular axes, in the direction of the inside of the box, on which three differential pinions rest, gearing on the one hand into the center pinion and on the other hand into a toothed ring on the inside periphery of the box.

Abstract: A refrigeration compressor having a plurality of pistons reciprocated by a crankshaft and in which the crankshaft is made up of two parts that are permanently fixed together by means of a sleeve which is press fit over adjacent ends of the two pieces of the crankshaft. The adjacent ends also have complementary parts which inter-engage with one another so as to hold the throws of the crankshaft parts in proper relationship and timing to one another. A bearing is mounted on the press fit sleeve and a split bearing support then embraces the bearing so as to hold the assembly in precise support in the compressor frame. The split bearing support includes a lower bearing support case to which is bolted an upper semi-circular cap. The support case is also semi-circular and has a radial split cut into it which is bridged by a tapered pin so that upon tightening of the pin the bearing support case is urged apart or expanded to thereby be tightly mounted in the compressor frame.

Abstract: A power transmission having two planetary assemblies, each having at least one carrier with planet gears, at least one sun gear, and at least one ring gear. A speed-varying module is connected in driving relation to the input shaft and in driving relationship to the sun gear or gears of the first planetary assembly. The speed-varying means may comprise a pair of hydraulic units hydraulically interconnected so that one serves as a pump while the other serves as a motor and vice versa, one of the units having a variable stroke and being connected in driving relation to the input shaft, the other unit, which may have a fixed stroke, being connected in driving relation to the sun gear. The input shaft is also connectable by a first clutch to a carrier of the first planetary assembly and by a second clutch to a sun gear of the second planetary assembly.

Abstract: A fluid pressure supply arrangement for the hydraulic control system of an automated countershaft power transmission for an automotive vehicle, wherein a fluid pressure is generated by vacuum supplied through a vacuum cut-off valve and is directed to the hydraulic control system through a pressure cut-off valve, each of the vacuum and pressure cut-off valves being closed when the engine is at rest and simultaneously the gearshift control lever for the power transmission is held free from a manipulative force.

Abstract: The invention relates to a machine tool of the type having a rotatable support for the material to be worked upon and a slide movable toward the work carrying a programmed turret with a plurality of tool supports which may be indexed to position one tool at a time for operation on the work and more particularly to mounting of the tool turret for indexing with torsional stiffness and for recessing of the work radially of its axis of rotation by a hydraulic means while maintaining torsional stiffness.

Abstract: The cutting of masses composed of multiple thickness of expanded foil is accomplished using reciprocating toothed blades that are deeply notched so that the strands of the expanded mesh enter deeply into the notches and are sheared through between the teeth of the blades.

Abstract: The invention provides an arrangement for detecting faults in wrapped filter rod, for tobacco-smoke filtration, prior to its being cut into lengths, the arrangement comprises a light source and a light-sensitive receiver, for example a photo-transistor, in a housing provided with a rod guide which imposes on the rod a path between and spaced away from the said light source and receiver, a beam of light from the said source being projected through the said path of the rod to the receiver. Advantageously the housing bounds a cavity from which extraneous light is excluded and the light source and receiver are disposed behind respective transparent windows spaced away from the said rod path. The said receiver may be operatively connected to a system by which a faulty rod length detected is caused to be rejected after having been cut off from the rod.

Abstract: A broccoli quartering machine for quartering spears of broccoli includes a conveyor adapted to move in a lineal path and having rigid plates upon which are mounted resilient, conical, cup-shaped holding members for holding the individual spears of broccoli. The apex of the cup-shaped members extends downward through an opening in each plate and is open, and each cup-shaped member includes at least two pairs of slots which extend from the open apex upward toward the base of the cup-shaped member. A plurality of cam followers are mounted on the cup-shaped members and contact a guide strip on the machine frame so as to align one pair of the slots with a first cutting disc and to engage a cam on the machine frame to rotate the cup-shaped member and the spear of broccoli therein 90.degree. between the first cutting disc and the second cutting disc so as to align the remaining pair of slots with the second cutting disc.

Abstract: A slitter for cutting lengthwise a wide and flexible web into a predetermined width is provided with a press roller in which a resilient outer peripheral surface may be pressed against an outer peripheral surface of the lower cutting edge under predetermined pressure. The press roller has a resilient body having a rubber hardness of 20 to 80 degrees and which is finished to a surface roughness of 10 to 50 .mu. H max.

Abstract: A machine, particularly for stamping or nibbling, comprises a reciprocating tool drive having a plurality of tools connected to the drive for selective reciprocation thereof. The drive includes means for stopping at least one of the tools for exchange purposes and a tool-change member is mounted for movement alongside the tool drive and includes a member movable transversely to the reciprocation direction for engaging and removing a tool which is stopped or disconnected from the drive in order to effect an exchange with another tool without stopping the drives of these other tools. The machine also includes means for engaging and moving a workpiece transverse to the reciprocating direction.

Abstract: A voice-controlled electronic musical instrument provides tones responsive to audible energy imparted to a microphone. An analog voltage representative of the frequency of the audible energy imparted to the microphone controls a gate signal generator. The gate signal generator decodes the analog signal into a digital word having octave and note information. The octave and note information gates operator-selected musical tones to provide a desired output signal responsive to the audible energy applied to the microphone.

Abstract: An electro-acoustically amplified drum consists of a hollow drum shell having at least one open end, a drum head spaced from the open end of said drum shell and supported thereon, and a microphone supported on and positioned within said drum shell and adapted to be connected to an external amplifier and speaker. The microphone is preferably supported in a position spaced from the wall of the drum shell to receive acoustical impulses separately from the drum head and the drum shell.The drum head may be a separate drum head supported on the drum shell in a fixed position or adjustable in relation to the spacing from the open end of the drum shell. Alternatively, the drum head may be supported on a drum shell having a plurality of apertures adjacent to the point of support, said apertures providing acoustical openings separating the drum head from the remainder of the shell which functions as a drum shell resonator.

Abstract: An electronic sensing device for use with resonating musical instruments is disclosed which includes a housing having control units, a bracket for holding the housing on the stringed instrument, an electronic sensor unit of the type such as a piezoelectric pickup, and a telescoping and pivoting arm joining the pickup to the housing.

Abstract: An open capotasto essentially comprising a substantially U-shaped, metallic bracket, one leg of which is provided with a string depressor cushion or pad and the other leg of which with a clamping or tightening device. Both legs of the bracket can be resiliently spread away from one another. One of the legs and part of the yoke of the bracket are surrounded by a sleeve formed of compressible material and forming the string depressor cushion or pad. At the region of the yoke this sleeve possesses a projection or extension which protrudes in the direction of the clamping or tightening device, the latter of which is effective in its clamping action through such projection. The clamping device can be in the form of an eccentric or clamping lever.

Abstract: A keyboard assembly for toy musical instruments, such assembly being executed in plastic and including a base with an upper section for receiving a plurality of tone bars and a lower section for receiving a like plurality of keys. Each key is removably mounted upon a discrete upstanding column on the base by a friction fit defined between the column and a pair of supports on the underside of the key; each column is formed of two resilient halves separated by a gap. Each key is an integrally formed, molded member comprised of several components with interrelated functions, such as (1) a key lever for manual depression, (2) a hammer at the end remote from the key lever, (3) a flexible segment for propelling the hammer against a tone bar in response to depression of a key lever, and (4) cooperating abutments for damping out reverberations of the hammer that might cause repeated strikings of the tone bar and/or chattering of the hammer.

Abstract: A blind fastener assembly includes a pin, an expander and a sleeve. The pin and expander may include, in one configuration, mating threads for drawing the sleeve axially over the expander toward the blind side of a workpiece, or the pin may be a pull-type wherein the portion of the pin opposite from the blind side end has pull grooves which are adapted to be gripped by a conventional pull gun. The sleeve is a tubular member having a portion of varying radial wall thickness between the ends thereof. The expander extends through aligned holes in the workpieces and has a tapered nose surface proximate the reduced thickness portion of the sleeve. When an axial force is exerted on the pin, the sleeve is forced over the tapered nose surface on the expander toward the blind side of the workpiece and is expanded in diameter.

Abstract: A generally rectangular flat housing is connected with one clamp of a self-centering work holder of an engraving machine for movement therewith. The housing slidably and pivotally supports a plurality of links connecting a control shaft with a pair of spaced-apart arms journalled by the housing for movement toward and away from each other in a pivoting action by the control shaft. When moved toward each other, the arms contact the respective opposing ends of a trophy plate to be engraved when loosely supported by the work holder for centering the trophy plate on the work holder prior to the engraving action thereon.

Abstract: A power transfer unit for transferring power between two separate hydraulic circuits comprising a casing, a pair of cylinder blocks in the casing, cylinders within each cylinder block, a piston in each cylinder, a leakage chamber within the casing, cam means located in said chamber for causing joint reciprocation of the pistons, pistons or extensions thereof extending from the cylinders to the cam means in the chamber, first valve means co-operating with the cylinders of the first block, second valve means co-operating with the cylinders of the second block, first leakage collecting means for the first valve means separate from said chamber, second leakage collecting means for the second valve means separate from said chamber, and a vent for said chamber separate from said leakage collecting means.By this arrangement any leakage to the chamber may be from either or both circuits and by virtue of the vent may be disposed of rather than fed back to either circuit.

Abstract: An axially oriented variable displacemnt pistoned device adaptable for use as motor and having a pivoted swash plate angularly positionable for establishing displacement of the device is fitted with externally mounted low pressure hydraulic actuators operably connected with the swash plate for operation thereof. Adjustable stops are provided in the device body to limit travel of the swash plate under urging of the low pressure hydraulic actuators.

Abstract: A fluid supply distributor communicates fluid from a stationary fluid source to a rotating hydraulic motor. The distributor includes a housing with main ports for connection to high and low pressure at the source. A shaft rotating in the housing is attached to the motor and includes motor ports for connection to the rotating motor. A sleeve in the housing surrounds the shaft, and the sleeve and shaft define interfacing sealing surfaces. The housing, the sleeve, and the shaft include passages for communicating fluid between the main ports and the motor ports. The sleeve is normally retained in a stationary position, but is released to rotate within the housing should the shaft seize within the housing. The passages include spaced supply grooves at the sealing surfaces connected to the main ports and thus maintained at different pressures.

Abstract: A vapor engine including a cylinder in which a piston reciprocates and having an inlet valve in the cylinder head which is driven from its seat by the piston as it approaches the cylinder head. The time at which the valve is driven from its seat does not change relative to the top dead center position of the piston. The travel of the valve body is ballistic and the valve remains open for a time determined by a combination of the piston velocity at the initial contact, the distance the valve travels before hitting a stop from which it rebounds elastically toward its seat, the pressure drop across the valve and the mass of the valve. The exhaust valve of the engine may be either internal and actuated by mechanical forces or external, in which case it is actuated by pressure forces. In one embodiment of the invention the stop from which the valve rebounds may be adjustably positioned manually or automatically to control the period of time during which the intake valve is open.

Abstract: An apparatus and method for improving coffee grounds usage wherein a removable insert means is provided for confining coffee grounds within a substantially annular area of a coffee grounds receptacle. In an alternative embodiment, a coffee grounds receptacle for a coffee maker is provided, having an inner spacer means whereby coffee grounds are confined to an annular area between the inner spacer means and the outer wall of the receptacle. In each of the embodiments, the insert means or the coffee grounds receptacle is provided with an aperture means for accommodating a tube conveying rising hot liquid to an area above the coffee grounds, and further includes a plug for the aperture means so that the insert or coffee grounds receptacle is adapted to be used in a drip-type coffee maker.

Abstract: A bland protein product having a texture and mouth feel simulating animal meat is prepared by forming an aqueous slurry containing 40 to 50% of a protein material having a protein content of at least 70% on a solids basis, injecting steam into the slurry to propel it through a cooking tube, passing the protein material through a back pressure valve at the discharge end of the cooking tube, and recovering the textured product in a collection zone. The injection steam pressure is chosen to maintain a product temperature of 310.degree. to 350.degree. F. and a back pressure of about 60 to 80 psi in the cooking tube. Between the back pressure valve and the collection zone the protein material is subjected to an agglomeration and stretching treatment accomplished by passing the protein and steam mixture through a restriction means, or by injecting a stream of cold water at right angles into the cooked protein and steam mixture, or by both of these steps. Apparatus for performing this process is also disclosed.

Abstract: In a peach bisecting and pitting machine in which the fruit is gripped by a deformable gripper during the pitting operation, apparatus is disclosed for sensing the presence or absence of a fruit within such gripper and for preventing the gripping deformation of the gripper when no fruit is present during the operation of the pitting machine.

Abstract: Hydraulic "squeeze cylinders" control the size of the discharge orifice on an extrusion baler and are operated by a control circuit that relieves pressure in the cylinders in response to the buildup of a certain predetermined pressure level in the circuit. Pressurized fluid for the squeeze cylinders is supplied by a single-acting pump cylinder that is connected between the reciprocal plunger head and its push rod in such a way as to deliver a slug of pressurized fluid into the circuit on each compression stroke of the plunger, the pump drawing in a fresh slug from a reservoir during each retraction stroke of the plunger.

Abstract: A sugar mill utilizing an arrangement of rolls journalled between a pair of frame members, having a driven anvil roll as the lowermost roll. An adjustment cane roll is disposed between the frame members above the anvil roll. Intermediate and to one side of the cane and anvil rolls is a crusher/feed roll, and to the other side of the cane and anvil rolls there is a bagasse roll. The three uppermost rolls are adjustable with respect to one another, the side rolls may each be mounted in an eccentric or screw adjustable bearing support arrangement. A generally vertically disposed chute drops chopped sugar cane between the feed and cane rolls to permit gravity to aid in feeding of the chopped cane to the sugar mill. This arrangement of the rolls permits a higher sugar mill output per revolution of the rolls, than that of the prior art.

Abstract: An article crusher comprised of a base plate support having an upstanding member supporting a pivoted lever with a platen carried thereon adapted to be moved within a cylinder mounted on the support plate to crush an article or the like positioned therein, with said cylinder being shaped to facilitate the insertion and removal of the article.

Abstract: Ink compositions suitable for ink jet printing on a variety of substrates and particularly food products, for example citrus fruit, and method of marking such products are provided. The compositions are characterized by their ability to penetrate the waxed surfaces of such foods as citrus fruits to provide markings therein. Preferred compositions comprise essentially a solution of a food dye or combination thereof, a binder resin component, a solvent mixture containing alcohol, water and an organic compound selected from the group consisting of aliphatic hydrocarbons having 5 to 12 carbon atoms and aliphatic ketones; and, optionally, an electrolyte.

Abstract: 1. In an ordnance projectile having a side-spray warhead with a static frentation velocity V.sub.FS, an ordnance fuze comprising: radar means for making measurements of range and sight angle of a target; sources of fixed voltages proportional to predetermined target coordinates Z.sub.1, Z.sub.2, and Z.sub.3, in a coordinate system that rides with the fuze, the fuze trajectory being in the plus-Z direction; means for obtaining three voltages proportional to r.sub.1, r.sub.2, and r.sub.3, where r.sub.1, r.sub.2, and r.sub.3 are the fuze-to-target distances when the target Z-coordinates are Z.sub.1, Z.sub.2, and Z.sub.3 respectively; means for obtaining a voltage proportional to V.sub.Z, where V.sub.Z is the rate of change of the Z-coordinate of the target with time; a source of fixed voltage proportional to said static fragmentation velocity V.sub.FS ; electronic computer means for solving the equation.DELTA.T=Z.sub.3 /V.sub.Z -r.sub.4 /V.sub.FS,wherer.sub.4 =.sqroot.A.sup.2 r.sub.1.sup.2 -B.sup.2 r.sub.2.sup.

Abstract: A braking device for buffer stop assemblies comprises a buffer rail which is displaceably guided on a buffer stop construction, there being provided at least one friction element and bolts for clamping the friction element in braking frictional engagement with the buffer rail. The buffer rail is formed as a circular cross section tube having a smooth outer surface and the friction element by brake blocks engaging opposite sides of the tube and pressed against the tube by the bolts.

Abstract: In accordance with the present structure, in a railway hopper car a corrugated bolster web extends vertically between a bolster cover plate and the end hopper slope sheet. The vertically extending corrugations act as reinforcements in the web which web has at least some of the corrugations positioned over the side bearings and center plate.

Abstract: A floating pedestal liner for railroad trucks and a method for its mounting are disclosed in which the liner is restricted from moving in a vertical direction but is free to move in a horizontal plane either laterally or longitudinally.

Abstract: A load-restraining device is disclosed herein for use in lading-carrying vehicles, such as truck trailers. The device includes a curtain which is adjustably suspended from an overhead support that extends laterally across the top of the trailer and is mounted for longitudinal movement therein. The curtain includes laterally-extending pockets, each of which carries a load-restraining belt. Belt hooks on opposite ends of each belt cooperate with belt rails in the sidewalls of the trailer and a belt tensioner or buckle is provided at the center of each belt.The pockets on the curtain are positioned on the side of the curtain opposite the lading-engaging face, so as to maximize the strength of the curtain and are in a manner which inhibits removal of the belts and reduces pilferage.

Abstract: A tiedown winch for securing a load such as an automobile to a transporting vehicle such as a railroad car includes a housing slidable in a channel track carried by the transporting vehicle. A chain for securing the load is wound on a drum journalled in top and bottom walls of the housing for rotation around a vertical axis. Both end walls of the housing are provided with openings so that the chain can extend from the housing in either direction, and the openings include contiguous segments in the bottom wall to decrease the height of the housing. The top wall or cover of the housing is hinged for access to the drum, and a single locking mechanism is provided for the cover and for securing the housing against sliding in the track. In an intermediate position, the locking mechanism permits the housing to slide freely while the cover is held closed.

Abstract: An adjustable height tray table is disclosed having supporting legs which are not permanently secured to the tray, whereby the tray may be removed from the supporting legs and used separately or independently as a serving tray. Adjustment of the height is effected without the use of tools or supplementary fasteners. Indicia are provided on the tray for enabling the user of the tray table to quickly and easily adjust the table to the desired height. Leg assemblies are provided with areas or means which enable the legs to be coordinated with elements of the tray for enabling the desired height to be quickly and easily attained. The tray is provided with locator members which enable the tray to be adjusted to a plurality of selected heights.

Abstract: Sewage sludge is dewatered with the aid of lime and then incinerated using high sulfur fuel. During incineration the lime reacts with the sulfur in the fuel and with oxygen to form the solid CaSO.sub.4 for disposal and thus prevent formation of the pollutant, SO.sub.2 gas. High sulfur coal may be crushed and used as an additional filter aid or sludge conditioner and then serve as the auxiliary fuel during incineration.

Abstract: A work table of the type having a primary or base table top and a secondary table top mounted by means of parallel motion mechanism on such base table top so as to be lowered from a normal working position relative to an open-arm sewing machine resting on the base table top to an open-arm working position relative to such machine and having a short supporting leg for the secondary table top, which leg is adapted to rest upon the base table top in the normal working position, is improved by making the supporting leg retractable and arranging the parallel motion mechanism so that it does not pass dead center in the raising of the secondary table top to normal working position. In this way, considerable saving in table top material is achieved and raising and lowering thereof is facilitated.

Abstract: An apparatus for the transmittal of thrust from a powered watercraft having a ship-shaped bow to a powerless cargo-carrying watercraft having a bifurcated stern and a recessed well defined thereby may be fabricated from an elongated thrust transmitting apparatus horizontally mounted to the bow of the powered watercraft, complementary retaining apparatus mounted to the powerless watercraft within the recessed well and adjustable coupling apparatus mounted between the two watercraft in the proximity of the thrust transmitting apparatus and the complementary retaining apparatus for holding the thrust transmitting in retaining contact with the complementary retaining apparatus such that a horizontal pivotal axis, substantially transverse to the length of the two watercrafts is formed between the thrust transmitting apparatus and the complementary retaining apparatus.

Abstract: A floating island for the extraction of gas from the sea having a plurality of buoyancy units positioned on a base plate with columns extending upward therefrom, a height approximately the wave height expected. A platform containing gas liquefaction apparatus is positioned on the top of the columns. The buoyancy units are selected so that when the island is free floating, the columns project more than half way from the water.

Abstract: Tablets are coated by tumbling a batch of tablets in a rotating coating pan and subjecting the tablets while they are in the pan to a plurality of treatment steps. Each of these treatment steps consists of a plurality of treatment cycles each including a dosing period in which a measured quantity of tablet coating liquid is introduced into the pan, a drying period in which drying air is supplied to the interior of the pan and an intermediate mixing period during which the tablets tumble in contact with the already introduced coating liquid for a pre-set time and no drying air is supplied to the pan. The temperature of the batch of tablets being coating in the coating pan is sensed by a sensor. The temperature of the batch of tablets at the end of a pre-set time interval from the commencement of the drying period is stored in a memory device as a reference temperature.

Abstract: Method and machine and a log product for log house construction includes improvements in apparatus to shape, and finish the logs, divide into halves or quarter sections for tongue-and-groove assembly construction of floors, walls, or ceilings appurtenant to the log house. Equally-spaced holes between the tongues and grooves provide additional functional uses for utility lines or vertical supports as needed. The logs are finished by spraying them with selected fluids such as preservatives.

Abstract: Forming electric field in and out of the vertical overlap portion, bottom peripheral joint portion and top peripheral rolled portion of a paper cup made of paper or like material lined with a laminate, supplying charged powder particles in the space of said formed electric field to effect powder coating on said portions and with subsequent heat treatment, sealing layers are formed on said portions to become water tight; providing outside electrodes at the outside of said vertical overlap portion and folded portions and providing opposed electrodes in the inside of the paper container, providing a powder supplying means for blowing powder to said sealed portions and masking means for masking the portions not powder coated to securely seal said vertical overlap portion and folded portions.