Housing assembly for fluid marking device
AssigneeSanford Research Company
InventorDaniel W. Wollensak
Life of this patent
Estimating the term…
Abstract
A housing assembly for a writing instrument is provided comprising a long, hollow barrel member and a ferrule member assembled in end-to-end relationship to afford an inner chamber for a reservoir of marking fluid. A writing nib projects from the ferrule and extends into the reservoir. The ferrule member and the barrel member have adjacent skirt portions in telescoping assembled relation, the skirt portions, when moved longitudinally one into the other, afford latching means, sealing means and means for constraining relative rotation between the assembled ferrule member and the barrel member, thereby providing a securely sealed and easily assembled housing for a writing instrumemt.
Claims8
In a writing instrument of the type having a reservoir for marking fluid and a writing nib for carrying marking fluid from the reservoir to a surface to be marked, a housing assembly for the writing instrument, comprising:
- an elongate hollow barrel member having an inner chamber to receive the reservoir, the barrel member having a closed rear distal end;
- a ferrule member positioned in longitudinal alignment forwardly of the barrel member, the ferrule member having a passageway therethrough and a free end shaped to snugly receive the writing nib, at least one of said barrel and ferrule members being of resilient material;
- adjacent skirt portions of circular cross section on the barrel member and the ferrule member for securing the ferrule member against relative axial rotation with respect to the barrel member, the skirt portions having open end portions and being of a size to make a close mating fit one within the other when moved longitudinally toward each other, the one skirt portion having an outer annular surface and a first set of axially opening notches about its periphery, and the other skirt portion having an inner annular surface and being provided with a second set of complementary axially opening notches positioned in opposed relation to said first set of notches, said sets of notches being positioned for interfitting engagement to prevent said relative axial rotation when the one skirt portion is moved longitudinally into the other skirt portion;
- and
- preformed latch means on the inner and outer surfaces of the skirt portions for retaining the sets of complementary notches in interfitting engagement.
Dependencies are inferred from the claim text.