US3744921A - Glue gun construction - Google Patents

Glue gun construction Download PDF

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Publication number
US3744921A
US3744921A US00141110A US3744921DA US3744921A US 3744921 A US3744921 A US 3744921A US 00141110 A US00141110 A US 00141110A US 3744921D A US3744921D A US 3744921DA US 3744921 A US3744921 A US 3744921A
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Prior art keywords
plunger
melt chamber
adhesive
valve seat
spring
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US00141110A
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English (en)
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C Weller
A Brassaw
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Cooper Industries LLC
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Cooper Industries LLC
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C17/00—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces
    • B05C17/005—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes
    • B05C17/00523—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material
    • B05C17/00526—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material the material being supplied to the apparatus in a solid state, e.g. rod, and melted before application
    • B05C17/0053—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material the material being supplied to the apparatus in a solid state, e.g. rod, and melted before application the driving means for the material being manual, mechanical or electrical
    • B05C17/00533—Hand tools or apparatus using hand held tools, for applying liquids or other fluent materials to, for spreading applied liquids or other fluent materials on, or for partially removing applied liquids or other fluent materials from, surfaces for discharging material from a reservoir or container located in or on the hand tool through an outlet orifice by pressure without using surface contacting members like pads or brushes provided with means to heat the material the material being supplied to the apparatus in a solid state, e.g. rod, and melted before application the driving means for the material being manual, mechanical or electrical comprising a piston

Definitions

  • An electrically heated glue gun having an elongated tubular melt chamber for receiving a solid adhesive rod near one end thereof and having a convergently tapering portion at is other end, a nozzle coupled on the other end of the melt chamber having a bore defining a discharge orifice and a valve seat, a heating element for heating the adhesive in the melt chamber to a molten state, a plunger movable axially through the melt chamber for pressing the adhesive forwardly, a valve in the nozzle bore for normally closing against the valve seat and having a pin extending through the discharge orifice to be engaged by the work for opening the valve, and a spring mechanism to be releasibly coupled with the plunger to urge the plunger forwardly.
  • the present invention relates in general to devices for dispensing hot melt adhesives, and more particularly to hand held devices having a heated melt cham ber through which a hot melt thermoplastic adhesive is forced to melt and dispense the adhesive through a nozzle to a work surface.
  • Such devices are now commonly referred to as glue guns.
  • Hot melt adhesives in the form of thermoplastics and the like have been found to be well suited for a wide variety of uses and have come into popular use.
  • a number of hand held gun type dispensing devices for such hot melt adhesives have been developed, wherein the adhe' sive in a solid rod form is supplied to a heating passageway in which it is melted and extruded through a narrow opening onto the surface to be adhered.
  • One type of glue gun which has been offered commercially employs a ratchet and trigger mechanism for advancing the adhesive rod and has a nozzle which must be rotated by a wrench to close or open a valve mechanism in the nozzle to control leakage or drip during non-use.
  • An object of the present invention is the provision of a glue gun or thermoplastic adhesive dispensing hand tool of novel construction which has a spring urged force mechanism for continuously urging the solid adhesive rod toward the forward or discharge end of the heating chamber and which provides a convenient arrangement for loading new charges of adhesive in rod form into the glue gun.
  • Another object of the present invention is the provision of a novel glue gun having a heating chamber and discharge nozzle into which an adhesive charge in rod form is urged, and including a valve mechanism which automatically closes to prevent leakage of glue from the discharge opening except when a portion of the valve mechanism which projects through the discharge opening in the nozzle is pressed against a surface on which glue is to be deposited.
  • Another object of the present invention is the provision of a novel glue dispensing hand tool as described in either of the two preceding paragraphs, including a plunger or piston mechanism for urging the charge of solid adhesive into the heating chamber and discharge nozzle, wherein the plunger mechanism can be easily removed for cleaning of the tool or for replacement of the plunger assembly.
  • FIG. 1 is a perspective view of a glue gun or adhesive dispensing hand tool embodying the present invention
  • FIG. 2 is a vertical section view of the glue gun, taken substantially along the center line of the tool;
  • FIG. 3 is a schematic diagram of the electrical heating circuit for the tool
  • FIGS. 4 and 5 are vertical transverse section views through the glue gun, taken along the lines 4-4 and 55 of FIG. 2;
  • FIG. 6 is a fragmentary exploded perspective view illustrating the removable nozzle, the converging portion of the melt chamber, and the valve components of the glue gun;
  • FIG. 7 is a horizontal longitudinal section view, taken along the line 7-7 of FIG. 2;
  • FIG. 8 is a fragmentary longitudinal section view through the melt chamber and discharge nozzle portions of a modified embodiment
  • FIG. 9 is a vertical section view taken along the line 9-9 of FIG. 8;
  • FIG. 10 is a fragmentary section view through the melt chamber and discharge nozzle portions of another modified embodiment.
  • FIG. 11 is a vertical section view taken along the line ll--1l of FIG. 10.
  • the glue gun of the present invention is indicated generally by the reference character 12 and comprises a pistol-like housing 13 formed of mating housing halves 13A and 13B and including an upper body portion 14 and a pistol grip 15. Supported within the housing halves 13A and 13B in the upper region thereof is an elongated tubular melt chamber 16 having a cylindrical tubular portion 16A over the major part of its length and a converging truncated conical or tapered forward portion 168 at its forward end projecting forwardly from the gun housing 13 and terminating in an externally threaded annular end portion 16C surrounding a small diameter outlet opening 17.
  • an upwardly facing loading opening 18 communicating with a loading well 19 defined by the housing halves 13A and 13B and opening through the top of the housing 13, through which a glue charge in solid form in the shape of a cylindrical rod or stick, indicated at 20 in FIG. 2, can be manually inserted into the uniform diameter barrel portions 16A of the melt chamber 16.
  • a discharge nozzle 21 is threaded onto the end portion 16C of the melt chamber 16, and has a bore 22 therethrough, having a smaller diameter outlet section 22A at the forwardmost end of the nozzle, and intermediate diameter middle section 22B, and a larger diameter internally threaded rear section 22C which threads onto the annular end portion 16C.
  • a valve pin 23 has a smaller elongated cylindrical portion 23A within the bore portion 22 which projects forwardly from the nozzle, an enlarged valve portion 233 having a truncated conical surface confronting the annular transition wall between the bore portions 22A and 22B defining a valve seat, and having a shank portion 23C extending rearwardly through the tapered portion 168 of the melt chamber and maintained in generally centered position within the outlet opening 17 by the triangular valve washer 24.
  • a plunger 25 Projecting forwardly through the open rearmost end of the melt chamber 16 is a plunger 25 having a cylindrical teflon piston 26 at its forwardmost end whose outer diameter corresponds to the inner diameter of the uniform barrel portions 16A of the melt chamber, constrained by plunger washers 26A on a plunger rod 27 which is held in coaxial relation with the barrel portions 16A by a guide plate 28 fixed to the housing 13 and having a guide aperture through which the plunger rod extends.
  • a plunger knob 27A is provided on the rearmost end of the plunger rod 27 at a location rearwardly and external of the housing 13.
  • a spring 30 supplies the force to expel hot glue from the nozzle 21.
  • the spring 30 is located within a cylindrical spring tube 31 for guidance, positioned below and parallel to the axis of the plunger rod 27.
  • the forwardmost end of the spring 30 is anchored, as indicated at 30A, to a post or anchoring formation on the housing 13, and the rearmost end of the spring 30 is anchored to a forwardly projecting cylindrical boss 32A on a manual spring pull device 32 having a finger hole 328 therein.
  • the boss 32A is positioned within the rearmost end portion of the spring tube 31 and the spring tube is secured to it, for example, by the inwardly deformed indentation 31A.
  • the forwardmost end of the spring tube is outwardly flared as indicated at 318 so that the circular outermost edge of the outwardly flared portion is slidably guided in the cylindrical cavity indicated at 33 defined by confronting portions of the housing halves 13A, 13B.
  • the forwardmost end of the spring pull device 32 is inclined upwardly and forwardly to correspond to the inclination of the rearmost end of the upper body portion 14 of the housing 13, and has a forwardly opening cavity 32C therein sized to releasibly receive the plunger knob 27A.
  • an electrical heating element 34 encompassed by a tubular metallic sleeve defining an element cover 35 for the heating element and also providing an elongated generally cylindrical thermostat well 35A along the bottom of the element cover to removably receive a cylindrical probe portion. 36A of a thermostatic switch 36.
  • the heating element is formed of a wrap of mica sheeting, wrapped for example in spiral fashion about the barrel portion of the melt chamber 16, with a first winding layer of resistance wire, such as nichrome wire, forming a 150 watt winding HW-l between successive layers of the mica sheeting, and a second outer winding HW-2 forming a ballast winding, as hereinafter described with reference to the schematic electrical circuit.
  • a first winding layer of resistance wire such as nichrome wire
  • HW-l 150 watt winding HW-l between successive layers of the mica sheeting
  • HW-2 second outer winding
  • ballast winding as hereinafter described with reference to the schematic electrical circuit.
  • Nickel strips or similar thin conductor strips may also be provided between layers of the mica sheeting to make electrical connections with the windings as required.
  • the spring biased pull device 32 is pulled rearwardly against the force of the spring 30 until the cavity 32C therein is withdrawn from about the plunger knob 27A, and the pull device 32 is then rotated about the axis of the spring tube 31 so that the portion having the cavity 32C therein extends laterally from the axis of the boss portion 32A.
  • the plunger rod 27 is then pulled rearwardly as far as it will go, withdrawing the piston 27 to a position just rearwardly of the loading opening 18, as determined by the limit stop screw 37, and a glue stick or rod 20 is inserted manually through the loading well 19 and opening 18 into the melt chamber 16.
  • the plunger 25 is manually pushed forwardly to begin advancing the rod toward the nozzle, and the spring pull device 32 is then withdrawn to a point rearwardly of the plunger knob 27A and rotated upwardly to align the cavity 32C with the plunger knob 27A, and the pull device 32 is then allowed to be drawn forwardly by the spring 30 to receive the plunger knob 27A in the cavity 32C and exert a spring force on the plunger rod 27 forcing the plunger forwardly to advance the glue stick 20 as far as it will go toward the tapered portions 16B of the melt chamber 16.
  • the heating element 34 When the heating element 34 is energized as described hereinafter, to heat and melt the glue in the melt chamber 16, the spring force exerted on the plunger assembly 25 by the spring 30 forces the glue forwardly into the tapered chamber portions 16B and into the bore portion 22B of the nozzle 22, where a hydraulic pressure within the melt chamber is created and acts internally on the valve pin 23 to force the enlarged valve portion 238 against its seat formed by the transition wall between the nozzle bore sections 22A and 22B.
  • the forwardly projecting portion 23A of the valve pin is pressed against a surface on which glue is to be deposited, the enlarged valve portion 233 is moved rearwardly from its seat and glue is allowed to pass through and exit from the nozzle 22.
  • the glue gun is designed so that approximately one and one-half sticks of glue are required to fill that portion of the melt chamber 16 of an empty glue gun extending forwardly of the loading opening 18.
  • the length of the stroke of the plunger 25 from the location disposing the piston 26 at the forwardmost end of the loading opening 18 to the forwardmost end of the stroke is such that when the tool is in use, a volume of glue equivalent to one stick is all that can be dispensed. Because of this, when the plunger reaches the forwardmost end of its stroke, the glue gun can be reloaded with another glue stick and immediately used again, since there is still melted glue in the forwardmost portion of the melt chamber.
  • the thermostat switch or thermally actuated switch mechanism 36 having the probe portion extending into the lower well 35A of the element cover 35 is preferably of the type wherein the probe includes a ceramic sleeve which houses a thermally expandable metallic rod located coaxially within the sleeve and secured to or in abutment with the sleeve at the forwardmost end of the probe portion.
  • the rod projects from the other end of the ceramic sleeve and engages a spring-like switch arm or similar switch member when the rod has expanded to a selected extent to open a pair of switch contacts which are normally closed until they are forced open by expansion of the rod.
  • FIG. 3 A schematic diagram of the electrical circuit is illustrated in FIG. 3. It will be noted that in the preferred form of the circuit illustrated in FIG. 3, the first or principal heating element winding HW-l is connected across the supply line through the over-temperature protector OTP and the therstat switch 36, the latter shunting the second or ballast heating element winding I-IW-2 and the indicator lamp IL. The thermostat is closed until the glue gun has heated to the preset temperature of the thermostat, which is approximately 350F in one practical embodiment.
  • the heating element HW-l When the glue gun is coupled to an appropriate power source, the heating element HW-l is connected across the supply line through the closed thermostat 36 and causes a rapid heatup of the melt chamber 16.
  • the first heating element dissapates approximately 130 watts to effect rapid heating of the melt chamber.
  • the thermostat is thermally coupled to the heating element HW-l by being located in the well 35A immediately adjacent the heating element windings, and opens when the melt chamber temperature reaches approximately 350 F. After the thermostat switch 36 opens, the current must then flow through the heating element winding HW-l and the second heating element windings HW-Z and the illuminating lamp IL. The illumination of the lamp IL indicates to the user that the tool is ready for use.
  • the second or ballast heating element winding is designed so that the tool stabilizes at a temperature higher than the switching temperature of the thermostat switch 36 so that the thermostat switch stays open and the lamp IL stays lit.
  • the second heating element winding I-IW-2 may be of such value as to make the total current about 0.27 amperes, reducing the total wattage to about 31 watts, including the wattage dissapated by the lamp.
  • the lamp IL functions both as an indicator to show that the melt chamber has been heated up to the proper temperature for operation and also as an illuminating work light.
  • the over-temperature protector OTP is thermally coupled to the heating elements and functions by melting at a selected over-temperature level to permanently open the supply circuit and cause the glue gun to no longer function until it has been repaired.
  • the over-temperature protector could be located in series with the thermostat switch 36 in the line which bypasses the second winding HW-2 and the lamp IL, so that if the thermostat switch failed the overtemperature protector could open the thermostat circuit permanently. In such a case, the glue gun would be ON continuously when it was plugged into a power source, would take much longer to heat up, but would not overheat.
  • the plunger rod 27 and piston 26 can be easily removed for cleaning of the tool or to replace the plunger assembly.
  • the operator merely draws the pull device 32 rearwardly to withdraw the socket 32C from the plunger knob 27A and rotates the pull device 32 through about to a laterally extending position, and then removes the screws 28A and 37 to permit complete removal of the plunger assembly.
  • valve portion 238 will close against its seat whenever the valve pin 23 is withdrawn from contact with the work.
  • the extension spring 40 will therefore exert a resilient biasing force forwardly against the valve portion 23B of the valve pin 23 to urge the valve portion 23B to closing position engaging the valve seat and the nozzle and thereby coact with the hydraulic pressure of the melted glue in the forward portion of the melt chamber 16 which also exerts a' valve closing force on the valve portion 238 of the valve pin whenever the inwardly displacing force exerted on the valve pin by engagement with the work is removed.
  • valve guide and accelerator member 42 is provided in the tapered or converging portion 168 of the melt chamber.
  • This valve guide and accelerator member 42 is an aluminum member having a cylindrical tubular core portion 43 to encircle and slidably receive the shank portion 23C of the valve pin 23 and having substantially right triangular or truncated triangular vane portions 44 radiating at 90 positions relative to each other from the core portion 43 with their outer edges in intimate contact with the inside surfaces of the tapered portions 168 of the melt chamber 16.
  • the aluminum member 42 facilitates transfer of heat from the heating element 34 and walls of the melt chamber through the vane portions 44 to the glue in the converging or tapered portions 163 of the melt chamber.
  • FIG. 10 illustrates another construction for providing a limit stop limiting the extent of inward movement of the valve pin 23.
  • a short length of steel tubing 45 surrounds the shank portion 23C of'the valve pin immediately rearwardly of the valve portion 238, its length being such that the piece of tubing 45 would engage the valve washer 24 when the valve pin has reached the selected inward limit position to prevent further inward movement of the valve pin.
  • a close wound spring having a total length corresponding to the length of the tube 45 may be employed instead of the tubing 45, to surround the shank portion 23C and have a total length so as to engage the valve washer 24 when the valve pin 23 has reached the selected inward limit position to prevent further inward movement of the valve pin.
  • a glue gun for dispensing hot melt adhesive onto a work surface comprising a housing member, a tubular melt chamber having an elongated cylindrical por tion for receiving forwardly adjacent a rearward end thereof a solid rod of thermoplastic adhesive, heating element means for heating the melt chamber and adhesive rod therein, a nozzle removably mounted on a forward end of said melt chamber having a bore therethrough defining an outlet orifice for discharge of molten adhesive and a valve seat therein, a movable valve member coactive with the valve seat and an actuator pin projecting through said orifice to engage the work surface and be moved thereby to displace the valve member from said valve seat, a plunger slidable in said melt chamber for reciprocative movement axially therein between rearward and forward limit positions within said cylindrical portion of said melt chamber, said cylindrical portion having a lateral loading opening forward of said rearward end thereof located between said rearward and forward limit positions for introduction of the adhesive rod into said cylindrical portion along a path extending radially of the axis of
  • valve member includes a stem portion projecting rearwardly to a position to be engaged by said plunger at its forward limit position and forced thereby to closed position against said valve seat.
  • a glue gun as defined in claim 1 including a coil spring which is expandable and contractable along a spring axis paralleling the axis of said melt chamber, means providing a stationary anchor for a forward end portion of said coil spring, and said movable abutment member being guided for advancing and retracting movement along said spring axis and supported for angular movement about said spring axis from a first position in abutting relation to said plunger to a second position laterally displaced therefrom.
  • a glue gun for dispensing hot melt adhesive onto a work surface comprising a housing member, a tubular melt chamber having an elongated cylindrical portion for receiving adjacent a rearward end thereof a solid rod of thermoplastic adhesive, heating element means for heating the melt chamber and adhesive rod therein, a nozzle removably mounted on a forward end of said melt chamber having a bore therethrough defining an outlet orifice for discharge of molten adhesive and a valve seat therein, a movable valve member coactive with the valve seat and an actuator pin projecting through said orifice to engage the work surface and be moved thereby to displace the valve member from said valve seat, a plunger slidable in said melt chamber for reciprocative movement axially therein, spring means movable between coupled and decoupled relation with said plunger to resiliently urge the plunger forwardly when coupled therewith to urge the adhesive rod forwardly and cause molten adhesive to exert pressure on said valve member tending to close the latter against said valve seat, said spring means including a coil spring which is expandable
  • said plunger includes a piston movable within said melt chamber and a piston rod extending rearwardly therefrom to a position exposed rearwardly of the housing member, and said abutment member having a forwardly opening well therein for removably receiving the rearmost end portion of said piston rod.
  • said heating element means comprises a first heater winding of a selected wattage rating for producing rapid heating of adhesive in the melt chamber to molten condition when connected across a supply circuit, a first brance circuit including a thermostatic switch connected in series circuit relation with said first heater winding and a side of the supply circuit for connecting the first heater winding across the supply until a selected temperature is reached in the melt chamber, and a second branch circuit including a second heating element winding forming a ballast winding and a lamp connected in series with said first heater winding and paralleling the first branch circuit to reduce current flow through the first heater winding when the thermostatic switch opens to a value causing the heating element means to stabilize at a temperature slightly above the switching temperature for the thermostatic switch and cause the lamp to become illuminated.
  • a glue gun for dispensing hot melt adhesive onto a work surface comprising a housing member, a tubular melt chamber having an elongated cylindrical portion for receiving adjacent a rearward end thereof a solid rod of thermoplastic adhesive, heating element means for heating the melt chamber and adhesive rod therein, a nozzle removably mounted on a forward end of said melt chamber having a bore therethrough defining an outlet orifice for discharge of molten adhesive and a valve seat therein, a movable valve member coactive with the valve seat and an actuator pin projecting through said orifice to engage the work surface and be moved thereby to displace the valve member from said valve seat, a plunger slidable in said melt chamber for reciprocative movement axially therein, and a spring urged abutment member for driving the plunger movable parallel to said axis and transversely of said axis between coupled and decoupled relation with the plunger to resiliently urge the plunger forwardly when coupled therewith to exert such pressure on the adhesive in the melt chamber to cause the
  • a glue gun for dispensing hot melt adhesive onto a work surface comprising a housing member, a tubular melt chamber having an elongated cylindrical portion for receiving adjacent a rearward end thereof a solid rod of thermoplastic adhesive, heating element means for heating the melt chamber and adhesive rod therein, a nozzle removably mounted on a forward end of said melt chamber having a bore therethrough defining an outlet orifice for discharge of molten adhesive and a valve seat therein, a movable valve member coactive with the valve seat and an actuator pin projecting through said orifice to engage the work surface and be moved thereby to displace the valve member from said valve seat, a plunger slidable in said melt chamber for reciprocative movement axially therein, and spring means movable between coupled and decoupled relation with said plunger to resiliently urge the plunger forwardly when coupled therewith to exert such pressure on the adhesive in the melt chamber to cause the pressurized adhesive to force closed the valve member against said valve seat, said plunger being movable between rearward and forward limit
  • said heating element means comprises a first heater winding of a selected wattage rating for producing rapid heating of adhesive in the melt chamber to molten condition when connected across a supply circuit, a first branch circuit including a thermostatic switch connected in series circuit relation with said first heater winding and a side of the supply circuit for connecting the first heater winding across the supply until a selected temperature is reached in the melt chamber, and a second branch circuit including a second heating element winding forming a ballast winding and a lamp connected in series with said first heater winding and paralleling the first branch circuit to reduce current flow through the first heater winding when the thermostatic switch opens to a value causing the heating element means to stabilize at a temperature slightly above the switching temperature for the thermostatic switch and cause the lamp to become illuminated.

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US00141110A 1971-05-07 1971-05-07 Glue gun construction Expired - Lifetime US3744921A (en)

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DE (1) DE2165071A1 (it)
FR (1) FR2139220A5 (it)
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CN107138348A (zh) * 2017-05-31 2017-09-08 海宁市智慧光电有限公司 一种灯头注胶装置

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US20080236608A1 (en) * 2007-03-30 2008-10-02 Lvmh Recherche Applicator device for applying a cosmetic and the use of such a device
US7909044B2 (en) * 2007-03-30 2011-03-22 L V M H Recherche Applicator device for applying a cosmetic and the use of such a device
US20100051652A1 (en) * 2008-02-29 2010-03-04 Safeworld International Inc. Spray can handle attachment
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US11891324B2 (en) 2014-07-31 2024-02-06 Corning Incorporated Thermally strengthened consumer electronic glass and related systems and methods
US10611664B2 (en) 2014-07-31 2020-04-07 Corning Incorporated Thermally strengthened architectural glass and related systems and methods
US11097974B2 (en) 2014-07-31 2021-08-24 Corning Incorporated Thermally strengthened consumer electronic glass and related systems and methods
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US11643355B2 (en) 2016-01-12 2023-05-09 Corning Incorporated Thin thermally and chemically strengthened glass-based articles
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US11485673B2 (en) 2017-08-24 2022-11-01 Corning Incorporated Glasses with improved tempering capabilities
US10154676B1 (en) * 2017-11-07 2018-12-18 Walter Ready Food dispenser
US11708296B2 (en) 2017-11-30 2023-07-25 Corning Incorporated Non-iox glasses with high coefficient of thermal expansion and preferential fracture behavior for thermal tempering
US10413931B1 (en) 2019-01-11 2019-09-17 ACCO Brands Corporation Glue gun with sequential stick feed
US12064938B2 (en) 2019-04-23 2024-08-20 Corning Incorporated Glass laminates having determined stress profiles and methods of making the same
US11697617B2 (en) 2019-08-06 2023-07-11 Corning Incorporated Glass laminate with buried stress spikes to arrest cracks and methods of making the same
US12043575B2 (en) 2019-08-06 2024-07-23 Corning Incorporated Glass laminate with buried stress spikes to arrest cracks and methods of making the same
US11141757B1 (en) * 2020-12-04 2021-10-12 Homeease Industrial Co., Ltd. Fitting tube structure of glue gun

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Publication number Publication date
DE2165071A1 (de) 1972-11-23
IT949944B (it) 1973-06-11
NL7205970A (it) 1972-11-09
CA942491A (en) 1974-02-26
GB1325832A (en) 1973-08-08
FR2139220A5 (it) 1973-01-05

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