Refillable dispensing device having wiper seal

A method of assembling a reusable fluid material dispensing device, comprising the steps of:

• slidably inserting a refill assembly into an outer case until an upper sleeve closure of the refill assembly contacts a valve of the outer case;
• threading a bottom cap onto a bottom portion of the outer case to thereby simultaneously engage the bottom cap on the outer case and urge the refill assembly towards an upper portion of the outer case whereby the valve of the outer case comes into fluid communication with an interior of the refill assembly;
• and
• further threading the bottom cap onto the bottom portion of the outer case, to pressurize the interior of the refill assembly by releasing a piston of the refill assembly, the piston being released substantially immediately before the bottom cap is securely threaded onto the outer case.

A fluid material dispensing device, comprising:

• a separate, disposable, one-use refill assembly, consisting essentially of a rigid cylindrical sleeve and within said sleeve a supply of fluid material to be dispensed, said refill assembly having an elastically sealable aperture in the top thereof and having a pressure-supplying assembly in the bottom thereof, the pressure-supplying assembly consisting essentially of a piston means for urging the supply of fluid within the sleeve, a bottom member, a compression spring mounted between said bottom member and said piston means and locking means for releasably restraining said compression spring in a compressed state, the locking means being carried by the piston means;
• and
• a re-usable dispenser assembly consisting essentially of:
• a casing having an open bottom and a top wall provided with an opening, said casing being dimensioned to contain said refill assembly;
• an aerosol valve assembly secured in said opening;
• a bottom cap for said casing, said bottom cap being capable of movement relative to said casing and carrying unlocking means for unlocking said locking means in response to said movement and
• said aerosol valve assembly including a stem portion adapted to be inserted into the interior of said refill assembly through the elastically sealable aperture.