Abstract: The invention relates to a shrinking device for shrinking a rotary tool into a central receiving opening of a toolholder which holds said rotary tool in a press fit. The device an induction heating device for thermally expanding the toolholder in the area of the receiving opening. A cooling device with at least one cooling collar which can be placed on the toolholder, in physical contact with the same, and through which a liquid coolant can flow, is provided for cooling the receiving opening area of the toolholder. This liquid cooling considerably reduces the overall time span needed for the shrinking process.

Abstract: A personalized branding iron with interchangeable symbols, including: a handle arrangement having a first end and a second end; a mounting arrangement mechanically connected to the first end; and at least one unitary substantial symbol configured for branding. The mounting arrangement and the symbol are configured for convenient mechanical connection of the symbol to the mounting arrangement.

Abstract: An adjustable diving mask with a frame assembly has two-frames for mounting two lenses, and an angle adjusting mechanism mounted between the two frames for adjusting the included angle between the two frames, and accordingly, the included angle between the two lenses. The angle 10 adjusting mechanism includes a tight fit shaft having a tapered section and a non-circular section, about which the first and the second frame could be pivotally turned relative to each other to obtain a desired included angle between them.

Abstract: A method and apparatus achieves making a surface-analysis determination precedent to allowing an electrofusion welding operation on pipe stock which is prescribed to be scraped, skinned or cleaned of surface contaminants prior to being graded ‘passable’ for such electrofusion welding. The method and apparatus utilizes non-contacting probes affixed to the welding power-supply leads such that inspection is automatic on the applicable pipe section(s) contemporaneously prior to enabling power-supply to the hot-wire welding coils. If the applicable pipe section fails the inspection, the welding equipment is disabled until the probes are disassembled, and then re-assembled for a succeeding inspection, such that during the interim an operator presumptively rectifies the situation as by re-scraping or skinning the applicable pipe section.

Abstract: A household electric appliance including a heating part and titanium oxide particles to be activated by heating, the heating part being a heating device inherently possessed by the household electric appliance and/or an additional heating device not inherently possessed by the household electric appliance.

Abstract: A method and apparatus for incremental seal wire activation, in one embodiment, is a method of sealing a seam of a bag. The method includes sealing a first side of the seam utilizing a first configuration. The method farther includes vacuuming gases from the bag. The method also includes sensing a vacuum condition responsive to vacuuming the bag. The method further includes shifting to a second configuration. The method also includes sealing a second side of the seam utilizing the second configuration.

Abstract: An apparatus and device for fusing two or more foam components together by thermal welding, has an interface blade adapted for placement at an interface of foam components to be fused together, and a nozzle proximate to the interface blade for distributing a heated gas at the interface of the foam components. The nozzle may be located in a shroud proximate to the interface blade. An automated foam welding apparatus has a platform for supporting foam components or other components, a clamp for applying pressure to one or more of the foam components, and one or more welding heads mounted upon a track for translation proximate to the foam components to be welded together, the welding heads having an interface blade and a heated gas distribution nozzle, and optionally a trimmer for trimming excess material from one or more of the foam components. A hand-held foam welding device is also described.

Abstract: The invention relates to a shrinking device (1) for shrinking a rotary tool (5) into a central receiving opening of a toolholder (3) which holds said rotary tool (5) in a press fit. The device comprises an induction heating device (15, 18) for thermally expanding the toolholder (3) in the area of the receiving opening. A cooling device (51, 53) with at least one cooling collar (53) which can be placed on the toolholder (3), in physical contact with the same, and through which a liquid coolant can flow, is provided for cooling the receiving opening area of the toolholder. This liquid cooling considerably reduces the overall time span needed for the shrinking process.

Abstract: A method and apparatus achieves making a surface-analysis determination precedent to allowing an electrofusion welding operation on pipe stock which is prescribed to be scraped, skinned or cleaned of surface contaminants prior to being graded ‘passable’ for such electrofusion welding. The method and apparatus utilizes non-contacting probes affixed to the welding power-supply leads such that inspection is automatic on the applicable pipe section(s) contemporaneously prior to enabling power-supply to the hot-wire welding coils. If the applicable pipe section fails the inspection, the welding equipment is disabled until the probes are disassembled, and then re-assembled for a succeeding inspection, such that during the interim an operator presumptively rectifies the situation as by re-scraping or skinning the applicable pipe section.

Abstract: The invention relates to a device for producing bound written material with representative covers, for marketing texts, magazines, construction plans, collections of drawings, contracts, offers and promotional literature (catalogues) as required in small to medium sizes. A heatable ceramic surface with an integrated heating element has several inductive and thermal sensors on its underside, for detecting covers with a metal inlay and for controlling the heat output. Said inductive sensors are partially also supplemented with sensors with microswitches, optical sensors and additionally, a pressure sensor if the device is to be used for binding covers consisting of non metallic materials at the same time. The very short time for heating up the ceramic heating surface made technically possible by the invention and the use of the stored temperature is made optimal use of through an internal flap system which is motor-operated.

Abstract: Representative embodiments provide for a prosthetic device, including a pointer region, an electrically conductive touch pad supported by the pointer region and configured for selectively contacting a touch-screen display, and an electric heating circuit which is configured to selectively heat the electrically conductive touch pad in response to an actuation of a switch. Also provided is a method for using a prosthetic device including using prosthesis of a user to support at least a portion of the prosthetic device that includes an electrically conductive touch pad, warming the electrically conductive touch pad in response to a user input to the prosthetic device, and selectively contacting the touch-screen display using the electrically conductive touch pad in response to a user manipulation of the prosthetic device.

Abstract: A heating roller (21) includes a heat generating layer (22) that generates heat by electromagnetic induction, a heat insulating layer (23), and a supporting layer (24), which are provided inwardly in this order. The supporting layer (24) is formed of a material having a specific resistance of 1 ×10−5 &OHgr;m or higher. Therefore, even when the heat generating layer (22) has a thickness smaller than a skin depth, i.e. a thickness defined by a flow of an induction current, so that magnetic flux penetrates the heat generating layer (22) and even reaches the supporting layer (24), heat generation of the supporting layer (24) under an eddy current can be suppressed. Thus, the heat generating layer (22) can be decreased in thermal capacity, and heat generation of the supporting layer (24) is suppressed, so that only the heat generating layer (22) can be heated efficiently. As a result, a warm-up time can be reduced.

Abstract: A heating roller has a first heater lamp having a first filament made of tungsten, and a second heater lamp having a second filament wherein the second filament is a heating element whose resistivity value is greater than that of tungsten at a room temperature.

Abstract: A domestic manually operable iron intended for use without an ironing board comprises a sole plate (3) containing suction apertures (7) and a fan (8) driven by means of a motor (9) so that, in use, a fabric can be held against the sole plate (3) by the suction effect of air passing through the apertures (7).

Abstract: An apparatus (10) for splicing a heatable section (20) of a tubular heater (12) to a cold section, (22) the heatable section (20) includes an outer sheath (78), which has a heating element (84) therein. The cold section (22) includes an outer sheath (88) which has a cold pin (94) therein. The apparatus (10) comprises an enclosure (12) defining a chamber (62) which further defines opposed openings in communication with the chamber (62). A welding tip (30) extends into the chamber (62) and is capable of melting the cold pin (94) and welding the ends (80,90) of the heatable and cold sections (20,22) together.

Abstract: A fuse mechanism for a heating device according to the invention functions as a thermal fuse. A heater is located on a support. In spatial proximity and with heat conduction to the heater are provided solder contacts with electrical leads to the support. A metallic connection bridge is firmly soldered to the solder contacts and the position thereof with respect to said contacts is such that in the use state on softening the solder connection at the solder contacts the connection bridge is separated by gravity and drops off. In this way the electrical connection from the heater to a electrical supply is separated.

Abstract: The invention relates to a heat-emitting handling device with a heat reservoir which can be heated by microwave radiation and has a heat capacity, the heat reservoir being a molded part of a polymer and/or resin-bonded aqueous raw material with a mass adequate for the heat-storing capacity.

Abstract: A belt seam treatment apparatus includes a support element with a smooth surface that supports the seam region of the belt and a heat and pressure source that heats a treatment strip and the belt seam region and that forces the treatment strip against the belt seam region. The support element can be a tube over which the belt hangs and can include a vacuum belt hold system that secures the seam region against the tube during treatment. The heat and pressure source can be a heated pressure bar engaging the entire seam region or a heated pressure wheel traversing the seam region of the entire belt width.

Abstract: An ergonomic wax pen has an ergonomic case (1) with optionally finger-squeeze control of pressure to force out molten wax (7) from a wax chamber (6) through an extrusion nozzle at an extrusion end (3) to which predetermined application tips (21, 24, 25, 26, 27, 28) can be attached for predetermined wax applications. The ergonomic case includes a contoured taper from a major periphery (2) proximate the extrusion end to an oppositely disposed minor periphery (4) that is proximate a base end (5). A wax heater (10, 18, 19) is positioned externally from the wax chamber which is pressurized selectively with a pressurizer. The base end can include an orthogonal base plate (11) on which the ergonomic case can be positioned uprightly when not in use and with which the ergonomic case can be prevented from rolling when laid down.

Abstract: Insulator for electric heater which can make a heater coil to expand/contract uniformly, and permits an easy fitting of the heater coil thereto, and washing and drying machine having heater assembly therewith, the insulator including a body part (30) formed of an insulating material, a fixing slot in the body part for fixing the body part (30) to a holding member, a coil seating part at an end of the body part for being inserted in the heater coil (40) for supporting the heater coil (40), and a seating slot between the coil seating part and the body part for inserting the heat coil (40).

Abstract: A desk top sealer includes three compartments for housing a solenoid assembly, a power supply and a circuit board, respectively. A source of air flow flows into an initial compartment and is channeled through apertures in brackets forming the two remaining compartments for cooling purposes and is exhausted from each compartment through a base. The circuit board, upon actuation, provides RF energy to a fixed ceramic/metal jaw to heat and weld plastic tubing clamped to the fixed jaw by a movable jaw at ground potential. The movable jaw is guided during translation by a pair of rods extending from a face plate, which rods also prevent rotation of the movable jaw about its axis of translation to maintain the movable jaw in alignment with the fixed jaw. The movable jaw is relatively massive to serve as a heat sink for the heat of the tubing being welded and includes a substantial surface area to dissipate to the ambient environment any heat buildup that may occur.

Abstract: The present invention relates to a portable adhesive dispensing appliance with adjustable duty cycle. Rather than applying power continuously to the heating element, the element power is intermittently switched over to a variable duty cycle. Savings are gained in three areas: extended life of the element; less heat lost to thermal radiation; and less adhesive waste due to dripping and overheating. The duty cycle may be adjusted manually or automatically based on the temperature of the heating element, or tip. Additionally, the voltage and/or current to the heating element may be adjusted, either manually or automatically, for more rapid recovery during high usage periods. Higher throughput is achieved by sensing the temperature, comparing the temperature to a desired temperature, and then increasing the duty cycle by either or both one of increasing the frequency of duty pulses and/or lengthening the duration of the duty pulses.

Abstract: An induction heatable body (22) that quickly heats to a desired temperature, retains heat long enough to be used in almost any application, and develops no “hot spots” even when heated by a heating source having an uneven magnetic field distribution. The induction-heatable body (22) achieves the foregoing while remaining relatively lightweight, inexpensive and easy to manufacture. The induction-heatable body (22) includes a plurality of induction-heatable layers (32a, b, c) each sandwiched between alternating layers of heat retentive material (34a, b, c). The induction-heatable layers (32a, b, c) consist of sheets of graphite material that can be inductively heated at magnetic field frequencies between 20 and 50 kHz. The heat-retentive layers (34a, b, c) consist of solid-to-solid phase change material such as radiation cross-linked polyethylene.

Abstract: The present invention relates to a portable adhesive dispensing appliance with adjustable duty cycle. Rather than applying power continuously to the heating element, the element power is intermittently switched over to a variable duty cycle. Savings are gained in three areas: extended life of the element; less heat lost to thermal radiation; and less adhesive waste due to dripping and overheating. The duty cycle may be adjusted manually or automatically based on the temperature of the adhesive in the melt chamber. Additionally, the voltage and/or current to the heating element may be adjusted, either manually or automatically, for more rapid recovery during high usage periods. Higher throughput is achieved by sensing the temperature, comparing the temperature to a desired temperature, and then increasing the duty cycle by either or both one of increasing the frequency of duty pulses and/or lengthening the duration of the duty pulses.

Abstract: The device is based on an optionally single piece body (1), obtained by plastic moulding, of cylindrical configuration, with the opening and the corresponding axial and central neck (3) for the passing of a wick that, at its lower end, is immersed in an active substance contained in a vessel to which the device is applicable, having optional ribs (4) for holding and positioning the wick heating resistances, as well as projections (6) with cross channels (7) for the positioning of the ends of the electrical resistances wires, being supplemented with a piece (8) acting as a clip, that by means of a flap or arm (9) formed in it, the ends of the resistances are kept in the flutings (7), and allows the positioning of the contactors through which the electrical supply to those heating resistances is set up, a positioning that is carried out on an upper slot (10) set up in that piece (8) which has contactor connection flaps (11), and optionally a cover that assures a more reliable fastening by pressing on the upper

Abstract: A device for forming a pointed wire tip on the ends of wires is provided. The device has receiving elements for receiving a wire, and heating device. The device stretches the wire causing the wire to taper and break resulting in the formation of a pointed wire tip at the point of breakage.

Abstract: The movement and mixing of microdroplets through microchannels is described employing silicon-based microscale devices, comprising microdroplet transport channels, reaction regions, electrophoresis modules, and radiation detectors. The discrete droplets are differentially heated and propelled through etched channels. Electronic components are fabricated on the same substrate material, allowing sensors and controlling circuitry to be incorporated in the same device.

Abstract: An improved hair curling iron 1 with a radiant heat source 21 which emits visible light during operation in which the instantaneous intensity of the emitted visible light is substantially commensurate with the instantaneous power across the said heating element. Advantage of this improved iron includes a fast response time because of the radiant nature of the heating source and an improved, and more convenient, visual indication of the instantaneous operation conditions of the iron resulting from the visible light emitted by heating element which is concurrently generated with the useful radiant heat.

Abstract: A device for heating and closing heat-retractable clamps for surgical use includes a housing which encloses an electronic power and control circuit, a power cord connected to the circuit, and a heating unit for applying heat to the clamps. The electronic power and control circuit includes a power supply, a controller and a regulating circuit for delivering different predetermined amounts of heat, each corresponding to a clamp of a given size. The heating unit is capable of being sterilized in an autoclave and includes a linking cord, one end of which is capable of being plugged into the housing for the electronic circuit and the other end of which is coupled with a sleeve having a pair of electrodes and a control switch for operating the electrodes.

Abstract: An air-operated soldering device includes a pair of air cylinders which are operable to clamp a workpiece between the cylinders and a base. A clip holder is then advanced against the workpiece by a clip holder air cylinder. A pair of electrodes are then advanced against the workpiece by a pair of electrode air cylinders, and the electrodes are used to solder electrical contacts to the workpiece. An air operated position sensor is used as a limit switch to determine when the workpiece is properly positioned in the soldering device.

Abstract: The present invention relates to a glue gun for selectively supply molten adhesive. The glue gun comprises a housing, an actuator movable between actuated and non-actuated positions, and a nozzle configured to allow molten adhesive to flow therethrough. The housing an adhesive receiving chamber fluidly communicated with the nozzle. The chamber has an opening at one end thereof for allowing a supply of solidified adhesive to be inserted into said chamber. A heating element is associated with the chamber. The heating element is operable to apply heat to the lead end portion of the solidified adhesive supply sufficient to melt the lead end portion when an electric signal is applied to the heating element. A heating element controller operates to allow the electric signal to flow to the heating element for a period of time after the actuator has been moved to its non-actuated position and to thereafter prevent the electric signal from flowing through the heating element at the end of the time period.

Abstract: A device (1) is provided for heating up a tool holder which is part of a tool clamping chuck. Tool clamping chucks of this type have a coupling part which can be inserted into a machine tool. The tool holder, which can be removed from the chuck or is connected to it, is cylindrical or conical, for example, and has a coaxial fitting hole for receiving the shaft of an interchangeable tool, for example a drill or hob. The device (1) has a heating unit (2) to heat up and thus expand the tool holder and its fitting hole. Furthermore, the device (1) has an insert (3) with an exactly fitting internal receptacle opening (4), in particular for a planar contact with the outer side of the tool holder. This insert is made of a heat-conducting material or metal which can be heated with the heating unit (2), so that the heat energy transferred via this insert can be transferred in a uniform, quick and targeted manner, as well as in the desired dosing, to the tool holder.

Abstract: A sterile containment welding device includes a self-monitoring heater unit upstream from the space between the tube receiving channels. The wafer is positioned in the unit and mounted for movement through the unit prior to moving through the space. The self-monitoring heater unit comprises a heater which heats the wafer and a temperature sensor for monitoring the temperature created by the self-monitoring heater in a rapidly alternating sequence so that the wafer is heated to a predetermined temperature before being moved into the space and contacting the plastic tube or tubes.

Abstract: A method is provided for heating the surface of a tooling die. In the method, a heater element consisting of a fabric layer composed of conductive fibers is incorporated into the surface of a tooling die or mold. The heater element is attached to a power source, which energizes the element at prescribed intervals and temperatures to heat the surface of the tooling die.

Abstract: A heated apparatus, positioned in the X, Y, and Z directions, for forming fine lines of molten material on a substrate. The apparatus includes a pen having a refractory tip wetted with material in a molten state. The tip is attached to a V-shaped heater to form a heater assembly. The ends of the V-shaped heater are welded to the pins of a three lead TO-5 package base. The pen is then mounted on an apparatus adapted to direct writing. To that end, the pen is attached to a supporting device capable of moving in the X, Y, and Z directions. When the welding point of the tip/heater assembly reaches the melting point of the material to be deposited, it is dipped in a crucible containing the material in a molten state. The welding point nucleates a minute drop of the molten material, forming a reservoir. A thin film of material flows from the reservoir and wets the tip, which is then brought in contact with the substrate upon which the desired pattern is to be formed.

Abstract: In a wedge tool having a heating device, a metal rod having a heating line, a conductive wire or a thin film-type heating plate is disposed at a predetermined portion of the wedge tool, to which power is supplied through a power supply unit, respectively, in order to provide heat to the wedge tool in wire bonding process. By having such a construction, the wedge tool has the heating system for generating heat, so that a substantially preferable and remarkable bonding force can be obtained.

Abstract: An apparatus for simultaneously welding multiple molded plastic parts includes a power delivery module, a measuring arrangement, a parameter storage module, a user interface, and a controller, is designed for use with plastic parts that each have at least one fitting with a heating element and an identifying resistor. The power delivery module is designed to supply power to the multiple heating elements and includes a common power supply, multiple independently controllable power switching devices and multiple outputs, each designed for interconnection with one of the fittings. The measuring arrangement includes multiple interconnections for connecting to the heating element and identifying resistor of each fitting to which an output is connected. The measuring arrangement measures the resistance of the heating element and the identifying resistor of each fitting connected to the apparatus.

Abstract: The device includes an elongated electrical heating unit (20) whose length matches the length of an elongated opening in the device, and has a switching system to activate an electrical circuit at the moment when sheets to be bound are placed on the heating unit (20). Heating unit (20) is wired in series with a switch (11) in the switching system and a heating current switch (31). Means are provided to keep this heating current switch (31) turned on when the switching system is turned on. The device includes a comparator (34) whose input is connected to a temperature sensor (26); when a predetermined upper temperature limit (T.sub.max) is reached it turns off the heating current switch (31). There is also a provision so that after the heating current switch (31) is turned off it is kept off until the switch (11) in the switching system has been switched off and then on again.

Abstract: A soldering device for soldering lead wires from a disc head to a circuit of the disc drive includes a heat shield adapted to provide a protective barrier for a soldering tip during operation of a soldering instrument. During operation, the soldering tip is heated by a heating element for use. A heat shield is coupled with the soldering tip and designed to provide a temperature barrier along the length of the soldering tip and prevent damage to other wires in close proximity.

Abstract: An apparatus for automatically a pair of welding tubular components made of a thermally fusible resin by abutting them to each other, includes a pair of clamp units for holding the pair of tubular components, an abut portion on which the end face of each of the tubular component abuts when the pair of the tubular components are held by the pair of clamp units, a cutting unit for cutting respective end faces of the pair of the tubular components held by the pair of the clamp units so that the cut end faces are normal to the axis of the pipes, and a fusing unit for fusing opposing end faces of the pipes which are cut by the cutting unit, to an equal fusing depth. The cutting unit, the abut portion and the fusing unit are spacedly disposed on a rotary disc in an angular moving direction. One of the tubular components is moved toward the other of the tubular components which are fused by said fusing unit for welding them to each other.

Abstract: A method and apparatus for the microwave removal of contaminated concrete surfaces. The apparatus comprises a housing adapted to pass over a support surface. The housing includes a waveguide for directing microwave energy to the surface at an angle maximizing absorption of microwave energy by the surface. The apparatus is further provided with a source of microwave energy operably associated with the waveguide, wherein the microwave energy has a frequency of between about 10.6 GHz and about 24 GHz and acts to remove the uppermost layer from the surface. The apparatus further includes a debris containment assembly comprising a vacuum assembly operably associated with the housing. The vacuum assembly is adapted to remove debris from the area adjacent the surface.

Abstract: Marks such as patterns, designs, numbers, or the like are cut out of a mark sheet or mark sheets placed on a glass base by a thermal cutter having a heated cutting bit. The thermal cutter is movable two-dimensionally over the mark sheet, and is also vertically movable between an upper position in which the thermal cutter is lifted off the mark sheet supported on the base and a lower position in which the thermal cutter is lowered in contact with the mark sheet supported on the base. The thermal cutter is angularly movably supported on an eccentric shaft that is rotatable by a stepping motor. The thermal cutter has a cutting bit resiliently urged by a spring for stable positioning. A range or ranges in which desired marks are to be cut out of a mark sheet or mark sheets can be confirmed by being traced by the thermal cutter before the marks are actually cut out. When mark numerals indicative of desired numbers are to be cut out, such mark numerals are rearranged and displayed for the operator's information.

Abstract: A heating device including a wand having a heating tip of a configuration adapted to substantially matingly cooperate with formations provided on a thermoplastic, body absorbable, bodily tissue fixation plate. The substantially mating cooperation between the heating tip and the plate formations serves to facilitate in situ heating and bending of the plate into conformance with underlying bodily tissue during a surgical operation.

Abstract: Marks such as patterns, designs, numbers, or the like are cut out of a mark sheet or mark sheets placed on a glass base by a thermal cutter having a heated cutting bit. The thermal cutter is movable two-dimensionally over the mark sheet, and is also vertically movable between an upper position in which the thermal cutter is lifted off the mark sheet supported on the base and a lower position in which the thermal cutter is lowered in contact with the mark sheet supported on the base. The thermal cutter is angularly movably supported on an eccentric shaft that is rotatable by a stepping motor. The thermal cutter has a cutting bit resiliently urged by a spring for stable positioning. A range or ranges in which desired marks are to be cut out of a mark sheet or mark sheets can be confirmed by being traced by the thermal cutter before the marks are actually cut out. When mark numerals indicative of desired numbers are to be cut out, such mark numerals are rearranged and displayed for the operator's information.

Abstract: A process for the thermal cutting of a running, meltable fabric run includes cutting the fabric run by a hot cutting wire. The cutting wire extends in a plane extending essentially perpendicularly to the travel direction of the fabric run. The cutting wire is inclined relative to the fabric run by an angle of greater than 0.degree. and smaller than 90.degree..

Abstract: An optical fibre cable terminating tool (16) and method for terminating a cable to a connector (13) of the type having at one end a ferrule (14) provided with a meltable adhesive therein. The tool (16) has a recess 16a for receiving and locating a connector (13) with its ferrule end projecting from the recess and permitting the end to be inserted into a heating recess of an oven. A heat sensitive element (36) is provided on the tool spaced from the recess end and this displays a change in appearance at a predetermined temperature which is indicative of a higher temperature at the ferrule at which higher temperature the adhesive is molten.

Abstract: A push button type ignition switch for controlling the operation of an electronic igniter operated flame ignition type ignition gun, whereby the electronic igniter of the ignition gun is turned on to produce sparks as the button of the switch is depressed; a flow of gas is ejected from a gas tank for making a flame by the sparks as the base of the switch is moved forward after the button of the switch depressed; the base of the switch is stopped by a stop plate to close the gas tank as the button of the switch is released.

Abstract: A core remover for removing cores from paper rolls comprising a two-piece heating conducting tube, the top part of the tube having, a smooth tapered tip, containing a thermostat bulb and a heating element for heating the tube, and the connection elements for the thermostat and heating element extending downward through the bottom part of the tube and to the thermostat. The thermostat and heating element are connected so that control of the temperature of the heating element and tube may be made. A core with paper wrapped around it is placed over the tube and heated for a few seconds to loosen the glue. Following that, the core is manually removed and at the same time or after, the inner most sheet of paper is pulled about 2 inches from the center of the paper roll.

Abstract: An electrothermal color-varying instrument for inducing color change in a color-varying layer includes a heat generating element composed of a sintered barium titanate thermistor in face-to face contact with a heat transmitting member having a heating end portion for transmitting heat to the thermal color-varying layer. The thermistor has:(i) a positive temperature coefficient on the electrical resistance within a temperature range from 25.degree. C. to 70.degree. C.;(ii) a volume resistivity at 25.degree. C. (.rho..sub.25) within a range of 9.8.times.10.sup.-3 to 2.97.times.10.sup.5 .OMEGA..multidot.cm; and(iii) a ratio (.rho..sub.70 /.rho..sub.25) of the volume resistivity at 70.degree. C. to that at 25.degree. C. within a range of 5.ltoreq.(.rho..sub.70 /.rho..sub.25).ltoreq.400.The electrothermal heat generating element generates heat under the application of a voltage in the range of 0.8 to 40 volts and maintains a saturated heating temperature within a range of 30 to 100 degrees C.

Abstract: An apparatus for cutting fabrics and the like includes a workbench on which the fabric is placed, a first movable carriage freely movable in one direction along one side of the work bench, and a second movable carriage mounted on the first carriage which is freely movable in a direction perpendicular to the direction of movement of the first carriage. A cutter including a heated tip, is mounted on the second carriage, and the heated tip is displaceable into contact with a fabric for cutting a desired mark or pattern out of the fabric. The apparatus additionally includes an absorbent member for cleaning the heated tip after a cutting operation. The apparatus permits an automatic and efficient cutting operation for marks and can be manufactured economically.