| 摘要 |
A two-piece cylindrical telescopic canning sleeve comprising an inner lower member and an upper outer member. The outer member is provided with at least one set of a plurality of engagement devices. The inner lower member is provided with at least one set of a plurality of engagement devices complimentary to the engagement devices provided with the outer member. The telescopic canning sleeve is assembled for use by aligning the engagement devices of the outer member with the engagement devices of the lower member, then sliding the outer member over the inner member until the desired functional height of the canning sleeve is reached after which, the outer member is frictionally engaged with the inner member by twisting the outer sleeve member to the inner member so that the complimentary engagement devices frictionally communicate. |
