| 摘要 |
<p>A plunger (10) adapted for the enhanced cleaning of irregularities in the internal wall surfaces (26) of dispensing cartridges (12) for paste-like materials (14) is provided. Said plunger (10) comprises a plunger skirt (38), wall surface engaging means (34) on and projecting outward of said skirt (38) completely about said plunger (10). Said wall surface engaging means (34) are of a substantially uniform resilient compressibility and include longitudinally and peripherally spaced small areas (40) of a lesser degree of comprssibility relative to the major portion of said wall surface engaging means (40). <IMAGE></p> |
