Writing instrument's cap

Details Writing instrument's cap Writing instrument's cap

B - Operations, Transporting

43

K

B43K 23/12 (2006.01)

Patent

CA 2051472

A writing instrument's cap includes a main cylinder; and an inner cylinder fixedly fitted in the main cylinder at one end. In the present cap, the inner cylinder includes: a cup-shaped upper portion having a bottom, an annular flange provided to an upper end thereof, and a large diameter portion provided below the annular flange; and a cylindrical lower portion extended from the bottom of the cup-shaped upper portion in such a manner that the cylindrical lower portion is opened at the other end, wherein a vent member for communicating an interior of the cap with an outside air is provided to a wall of the cup-shaped upper portion.

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