Claims
- 1. A method for refilling a stick adhesive dispenser which releases adhesive by application to a surface, comprising a holder which is designed for closure by a cap, has an opening at a top end and comprises a screw threaded spindle axially aligned and centrally located with a free end at said opening, and an opposite end connected to the center of a hand rotatable knurled nut secured to a lower end of said holder, a replaceable plunger designed to engage said spindle for axial displacement over the length of said holder via turning of said knurled nut to apply said stick adhesive accommodated in said holder, wherein the improvement comprises the steps of:
- molding said stick adhesive to have a volume and form substantially the same as the internal configuration of said holder, and to have a central axially aligned blind hole exiting at one end of said stick adhesive;
- securing a said replaceable plunger on said one end of said stick adhesive, with said replaceable plunger having a central threaded bore located opposing said blind hole;
- retaining the molded said stick adhesive in a refill tube closed at one end, and open at the opposite end, with said replaceable plunger protruding from the opposite end;
- removing a spent plunger, if any, from said spindle;
- fitting said refill tube onto said holder in a manner permitting said replaceable plunger to engage the free end of said spindle via said central threaded bore in said replaceable plunger; and
- rotating said knurled nut for rotating said spindle in a direction for drawing said stick adhesive and associated said plunger from said refill tube into said holder as said spindle screws into said replaceable plunger and penetrates more deeply into said blind hole of said stick adhesive, the diameter of said blind hole being determined for insuring said replaceable plunger cuts only slightly into said stick adhesive.
- 2. A process for the production of a refill cartridge for a stick adhesive dispenser, which releases adhesive by application of an end of said stick adhesive to a surface, said process comprising a holder including an opening at one end, and a replaceable plunger designed for axial displacement over the length of the holder to apply said stick adhesive accommodated in the holder, whereby said refill cartridge is produced by filling a tube with liquified stick adhesive material, said tube being configured to the internal volume of a dispenser designed to accommodate the particular stick adhesive, and to the internal configuration of said holder, said tube having a base with a centrally located internal pin extending therefrom for forming a blind hole having a diameter sized for receiving a screwthreaded spindle that cuts slightly into said stick adhesive after solidification, said stick adhesive is ejected from the tube as a molding of said stick adhesive material, for insertion into the refill cartridge with a said replaceable plunger being attached to an end of said molding protruding from said refill cartridge, said plunger being formed throughout with a central screwthreaded bore, said plunger being introduced into the base of the tube.
- 3. A refill cartridge for a dispenser for stick adhesive which releases adhesive by application of an end of said stick adhesive to a surface, said dispenser including a holder which is designed for closure by a cap, an opening at at least one end, an internal replaceable plunger designed for axial displacement upon a rotatable screwthreaded spindle over the length of the holder to apply said stick adhesive accommodated in the holder, wherein the improvement comprises said refill cartridge including:
- a tube having a closed end, and an open end;
- a molding of the material of said stick adhesive adapted to the internal volume, designed to accommodate said stick adhesive and internal configuration of the holder, said molding being formed with a central axially aligned blind hole and contained in said tube with the blind hole exiting at the open end of said tube; and
- said replaceable plunger being secured to said molding at the open end of said tube, wherein said plunger is formed throughout with a central screwthreaded bore, said plunger being aligned with said bore opposing the exit of said blind hole.
- 4. A refill cartridge as claimed in claim 3, further including the screwthreaded bore being closed by a membrane designed to be pierced by the screwthreaded spindle.
- 5. A refill cartridge as claimed in claim 3, wherein the screwthreaded bore has at least a single screwthreaded.
- 6. A refill cartridge as claimed in claim 3 further including the base of the plunger being formed internally with a cone as an insertion aid for an end of said spindle.
- 7. A refill cartridge as claimed in claims 3, wherein the wall thickness of the tube is equal to that of the holder.
- 8. A refill cartridge as claimed in claim 3, wherein the tube and the plunger are made of plastic.
- 9. A refill cartridge as claimed in claim 3, wherein the inner surface of said tube is made slightly conical in shape, the conical taper towards an end opposite the plunger forming a cone angle of at most 3.degree..
- 10. A refill cartridge as claimed in claim 3, wherein the adhesive stick consists of a spreadable adhesive.
- 11. The refill cartridge of claim 3, further including:
- a hollow sleeve having thin side walls, said sleeve including first annular snap in joint means proximate a top edge of said sleeve, for mating with second annular snap in joint means proximate the open end of said tube, thereby permitting said sleeve to be snapped onto the open end of said tube, the interior configuration of said sleeve being dimensioned to provide sufficient space between interior wall portions of said sleeve and side walls of a said replaceable plunger secured to said molding of said stick adhesive, for permitting the space to receive a portion of the said one end of said holder to mount said refill cartridge onto said holder, thereby facilitating the transfer of said molding of said stick adhesive with said replaceable plunger from said tube into said holder.
Priority Claims (3)
Number |
Date |
Country |
Kind |
40 36 396.1 |
Nov 1990 |
DEX |
|
41 12 432.4 |
Apr 1991 |
DEX |
|
41 20 969.9 |
Jun 1991 |
DEX |
|
Parent Case Info
This application is a continuation of application Ser. No. 08/050,460, filed as PCT/EP91/02098, Nov. 6, 1991 published as WO92/08358, May. 20, 1992 now abandoned.
This application is related to divisional application Ser. No. (Attorney Docket No. D 9190 IIA) filed on Mar. 27, 1995.
US Referenced Citations (12)
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Continuations (1)
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Number |
Date |
Country |
Parent |
50460 |
Jul 1993 |
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