| CPC B05C 17/0103 (2013.01) [B05C 17/00553 (2013.01); B05C 17/00569 (2013.01)] | 23 Claims |

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1. A cartridge holder for a dispenser,
the cartridge holder configured to alternately receive at least a first type of cartridge and a second type of cartridge containing viscous material,
the first type of cartridge being different in size from the second type of cartridge,
the cartridge holder comprising:
a distal stop configured to receive a dispensing end of the first and second type of cartridges;
a proximal receptacle configured to receive a rear end of the first and second type of cartridges,
the proximal receptacle located opposite to the distal stop along a longitudinal axis of the cartridge holder,
the proximal receptacle is movable along the longitudinal axis and spring loaded towards the distal stop, and
the proximal receptacle being configured to contact a rear end of the first type of cartridge at a smaller distance from a rear end of the proximal receptacle than a rear end of the second type of cartridge; and
an adapter attachable to the receptacle via an attachment structure,
the receptacle comprising a first locating element that is configured to contact the rear end of the first type of cartridge, and
the adapter comprises a second locating element configured to contact the rear end of the second type of cartridge.
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