PATENTKRAV 1. Dispenser (1) til udpresning af materiale fra en patron, omfattende en patronholder (2) for en patron, der har en eller flere cylindre, og et eller flere stempler (13, 14) til udpresning af materiale fra en cylinder, samt et drivorgan til fremdrivning af stemplet eller stemplerne, hvor patronholderen (2) omfatter mindst en understøtning (18, 19, 20, 36, 41, 49) , der kan bevæges mellem en første stilling, hvor der tilvejebringes passende understøtning for en første patron, og en anden stilling, hvor der tilvejebringes passende understøtning for en anden patron, kendetegnet ved, at understøtningen (18, 19, 20, 36, 41, 49,) omfatter første indgrebsorganer (24, 25, 37, 42, 50, 53, 23) til udløseligt indgreb med dertil svarende andre indgrebsorganer (26, 27, 39, 44, 52, 54, 60) udformet i patronholderen, således at understøtningen kan udskiftes uden brug af værktøj. 2. Dispenser ifølge krav 1, kendetegnet ved, at indgrebsorganerne omfatter en omdrejningstap (24, 25, 37, 42, 50, 53, 23) til indsætning i et dertil svarende leje (26, 27, 39, 44, 52, 54, 60), hvorved understøtningen (18, 19, 20, 36, 41, 49,) kan vippes mellem sin første stilling og sin anden stilling ved drejning af omdrejningstappen i dennes tilsvarende leje. 3. Dispenser ifølge krav 2, kendetegnet ved, at mindst et leje er udformet som et hul (33, 38, 45, 57), der er omgivet af en væg (32, 39, 44, 52, 54, 60), hvori der er udformet en indføringsspalte (31, 40, 43, 51, 59) for en omdrejningstap (24, 25, 37, 42, 50, 23). 4. Dispenser ifølge krav 3, kendetegnet ved, at mindst en omdrejningstap (24, 25, 37, 50, 23) har et langstrakt tværsnit, og at indførings -spalten {31, 40, 51, 59) af det tilsvarende leje har en bredde, der er mindre end den maksimale længde af tværsnittet af omdrejningstappen. 5. Dispenser ifølge krav 4, kendetegnet ved, at hullet i lejet (26, 27, 39, 54, 60) svarende til den mindst ene omdrejningstap (25, 37, 53, 23) er i det væsentlige cylindrisk med en diameter svarende omtrent til den maksimale længde af tværsnittet af omdrejningstappen. 6. Dispenser ifølge krav 4 eller 5, kendetegnet ved, at indføringsspalten (31, 43) har en bredde, der er større end den maksimale bredde af tværsnittet af omdrejningstappen(25, 42). 7. Dispenser ifølge et af kravene 3 til 6, kendetegnet ved, at de andre indgrebsorganer udgøres af det mindst ene leje (26, 27, 39, 44, 52, 54, 60) og er anbragt ved en bund (30) af patronholderen (2), og at indføringsspalterne (31, 40, 43, 51, 59) vender bort fra bunden (30). 8. Dispenser ifølge krav 7, kendetegnet ved, at væggen (32, 39, 44, 52, 54) af lejerne rager ud fra modstående indersider (5, 6) af patronholderen (2) . 9. Dispenser ifølge et af de ovenstående krav, kendetegnet ved, at understøtningen (18, 19, 20, 36, 41, 49) omfatter en i det mindste delvist cylindrisk aksel (23), der strækker sig mellem respektive første indgrebsorganer ved modstående ender af understøtningen, og at der i en bund (3 0) af patronholderen er udformet en udsparing (61) til delvis optagelse af akslen (23). 10. Dispenser ifølge et af de ovenstående krav, kendetegnet ved, at understøtningen (18, 19, 20, 36, 41, 49) omfatter to i forhold til hinanden vinklede vægge (21, 22), i hver af hvilke der er udformet en udsparing (28, 2 9) med en kontur, der danner en passende understøtning for en patron af en bestemt størrelse eller facon. 11. Dispenser ifølge krav 10, kendetegnet ved, at konturen af udsparingen (28, 29) i hver af de vinklede vægge (21, 22) danner mod hinanden vendende fremspring (62, 63), der ved indsætning af en patron griber fat omkring og fastholder denne, idet patronen giver elastisk efter for fremspringene under indsætningen. 12. Dispenser ifølge et af de ovenstående krav, kendetegnet ved, at der ved indersider af patronholderen er udformet rastorganer (35) til indgreb med endekanter (34) af understøtningen, således at denne kan fastlåses i henholdsvis sin første stilling og sin anden stilling. 13. Dispenser ifølge krav 12, kendetegnet ved, at rastorganerne (35) har form af kileformede fremspring, og at et par af modstående fremspring er anbragt over hvert leje (26, 27, 39, 44, 52, 54) og nærmere ved en overkant af patronholderen (2) end ved lejet, således at en endekant af en væg af understøtningen kan gå i indgreb mellem parrets to fremspring. 14. Fremgangsmåde til montering af en understøtning i en patronholder (2) af en dispenser (1), kendetegnet ved, at understøtningen (18, 19, 20, 36, 41, 49,) indføres mellem modstående vægge (5, 6) af patronholderen, og anbringes over lejer (26, 27, 39, 44, 52, 54) på væggene således, at en omdrejningsakse af understøtningen ligger i det væsentlige vinkelret på væggene, hvorefter omdrejningstappe (24, 25, 37, 42, 50) af understøtningen føres gennem indføringsspalter (31, 40, 43, 51, 59) i vægge, der omgiver lejerne, ved en i det væsentlige parallel forskydning af understøtningen, og hvorefter understøtningen drejes omkring sin omdrejningsakse, indtil den går i indgreb med fremspring i patronholderen.A patent claim 1. Dispenser (1) for extruding material from a cartridge, comprising a cartridge holder (2) for a cartridge having one or more cylinders, and one or more pistons (13, 14) for extruding material from a cylinder, and a drive means for propelling the plunger (s), wherein the cartridge holder (2) comprises at least one support (18, 19, 20, 36, 41, 49) movable between a first position providing appropriate support for a first cartridge and a second position providing appropriate support for a second cartridge, characterized in that the support (18, 19, 20, 36, 41, 49) comprises first engagement means (24, 25, 37, 42, 50, 53 , 23) for releasable engagement with corresponding other engagement means (26, 27, 39, 44, 52, 54, 60) formed in the cartridge holder so that the support can be replaced without the use of tools. Dispenser according to claim 1, characterized in that the engagement means comprise a pivot pin (24, 25, 37, 42, 50, 53, 23) for insertion into a corresponding bearing (26, 27, 39, 44, 52, 54). 60), whereby the support (18, 19, 20, 36, 41, 49) can be tilted between its first position and its second position by turning the pivot pin in its corresponding bearing. Dispenser according to claim 2, characterized in that at least one bearing is formed as a hole (33, 38, 45, 57) surrounded by a wall (32, 39, 44, 52, 54, 60), wherein an insertion slot (31, 40, 43, 51, 59) for a pivot pin (24, 25, 37, 42, 50, 23) is provided. Dispenser according to claim 3, characterized in that at least one pivot (24, 25, 37, 50, 23) has an elongated cross section and the insertion slot {31, 40, 51, 59) of the corresponding bearing has a width less than the maximum length of the cross-section of the pivot pin. Dispenser according to claim 4, characterized in that the hole in the bearing (26, 27, 39, 54, 60) corresponding to the at least one rotation pin (25, 37, 53, 23) is substantially cylindrical with a diameter approximately to the maximum length of the cross-section of the pivot pin. Dispenser according to claim 4 or 5, characterized in that the insertion slot (31, 43) has a width greater than the maximum width of the cross-section of the pivot (25, 42). Dispenser according to one of claims 3 to 6, characterized in that the other engaging means are constituted by the at least one bearing (26, 27, 39, 44, 52, 54, 60) and arranged at a bottom (30) of the cartridge holder. (2) and the insertion slots (31, 40, 43, 51, 59) away from the bottom (30). Dispenser according to claim 7, characterized in that the wall (32, 39, 44, 52, 54) of the bearings protrudes from the opposite inside (5, 6) of the cartridge holder (2). Dispenser according to one of the preceding claims, characterized in that the support (18, 19, 20, 36, 41, 49) comprises at least partially cylindrical shaft (23) extending between respective first engaging means at opposite ends. of the support, and that a recess (61) for partially accommodating the shaft (23) is formed in a bottom (30) of the cartridge holder. Dispenser according to one of the preceding claims, characterized in that the support (18, 19, 20, 36, 41, 49) comprises two mutually angled walls (21, 22) in each of which a recess (28, 2 9) with a contour forming a suitable support for a cartridge of a certain size or shape. Dispenser according to claim 10, characterized in that the contour of the recess (28, 29) in each of the angled walls (21, 22) forms opposite projections (62, 63) which, when inserting a cartridge, grip around and retaining this, the cartridge yielding elastically to the projections during insertion. Dispenser according to one of the preceding claims, characterized in that resting means (35) for engagement with end edges (34) of the support are formed at the inside of the cartridge holder so that it can be locked in its first position and its second position respectively. Dispenser according to claim 12, characterized in that the resting means (35) are in the form of wedge-shaped projections and that a pair of opposite projections are arranged over each bearing (26, 27, 39, 44, 52, 54) and closer to a upper edge of the cartridge holder (2) than at the bearing so that an end edge of a wall of the support can engage the two projections of the pair. Method for mounting a support in a cartridge holder (2) of a dispenser (1), characterized in that the support (18, 19, 20, 36, 41, 49) is inserted between opposing walls (5, 6) of the cartridge holder, and placed over bearings (26, 27, 39, 44, 52, 54) on the walls such that a axis of rotation of the support is substantially perpendicular to the walls, after which rotation pins (24, 25, 37, 42, 50) of the support is passed through insertion slots (31, 40, 43, 51, 59) in walls surrounding the bearings by a substantially parallel displacement of the support, after which the support is rotated about its axis of rotation until it engages with projections in the cartridge holder.