Multi-chamber dispenser for flowable materials

A multi-chamber dispenser for flowable materials comprising an upstanding disposable cartridge made of a rigid material, a plurality of flowable material supply chambers in said cartridge, said supply chambers being disposed in side by side relationship, each of said supply chambers having a top and having a closed bottom and closed side walls, a rigid reusable pump, said pump having a plurality of longitudinal passageways corresponding to the number of said supply chambers, said pump being of a size and shape to fit around and over said chambers, guide structure on said pump and said cartridge for telescopically receiving said cartridge in said pump, a head around each of said passageways of a size and shape to slide into a respective one of said chambers in sealing contact with said walls of said chamber, said passageway having an upstream inlet end positioned for extending into said chamber whereby relative downward movement of said pump causes the flowable material to simultaneously enter all of the said passageways from all of said chambers, each of said passageway having a downstream discharge end, said pump having a dispensing neck, said discharge ends of all of said passageways communicating with said dispensing neck for simultaneously dispensing the flowable materials from all of said chambers, detachable sealing structure covering said top of each of said chambers to maintain the flowable material in a sealed condition prior to use of said dispenser, and said guide structure also being part of detachable mounting structure for detachably mounting said cartridge and said pump together whereby said cartridge may be removed from said pump when its flowable materials have been dispensed and a further cartridge may be then mounted to said pump to permit said pump to be reused.