Coating implements with material supply – Projectable and retractable tool – With movable closure or gate
Patent
1987-03-16
1989-08-22
Apley, Richard J.
Coating implements with material supply
Projectable and retractable tool
With movable closure or gate
401111, 401115, B43K 2416, B43K 2408
Patent
active
048591033
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This case incorporates by reference pending related U.S. application Ser. No. 159,449 which is a continuation of U.S. application Ser. No. 762,196, now abandoned.
The invention relates to a writing implement comprising a sleeve-shaped housing and a writing element which is disposed in said housing and which is displaceable between a writing readiness position freeing the tip portion of the writing element serving for writing and a storage position retracted into the housing, the housing portion adjacent the tip portion of the writing element consisting of segments which in the writing readiness position are radially spread apart and in the storage position bear on each other and form a closure portion for the tip, the housing consisting of an outer sleeve and an inner sleeve which is disposed substantially within the outer sleeve relatively displaceable with respect to the latter in the axial direction to a limited extent and the segments forming the closure portion of the housing are mounted on the inner sleeve, project radially outwardly under biasing and lie partially outside the outer sleeve where they have a greater external diameter than the internal width of the tip-side end of the outer sleeve, the inner sleeve being biased via a spring bearing on the outer sleeve in the direction towards the storage position and axially displaceable by means of an actuating element against the pressure of the spring .
The invention is based on the problem of improving such a writing implement in such a manner that its production and actuation is further facilitated.
SUMMARY OF THE INVENTION
This problem is solved according to the invention in that the actuating element comprises a shift mechanism, that the spring biasing the writing element against the housing bears on the inner sleeve, that the shift mechanism engages the outer sleeve, that the return force of the spring biasing the writing element against the inner sleeve is smaller than that of the spring which biases the inner sleeve against the outer sleeve and that the actuating element consists of two elements which are axially displaceable with respect to each other and of which the first acts on the intermediate sleeve and the second acts on the writing element, carries the shift mechanism and is actuated by the first element.
Advantageously, the two elements of the actuating element have a substantially complementary form and have together substantially the form of a cylinder.
A further improvement of the writing implement according to the invention is achieved in that the segments have on their inner side in the region enclosing the tip portion in each of which correspondingly formed resilient sealing shells are secured which in the storage position engage on each other and form together a hermetically sealed chamber surrounding the tip portion. This configuration makes it possible to produce with simplest means a hermetic sealing chamber around the nib when the writing implement is in the storage position.
To obtain a greater flexibility of the segments the latter are preferably mounted via tapered web regions on the inner sleeve.
BRIEF DESCSRIPTION OF THE DRAWINGS
Hereinafter the invention will be described in detail with reference to the drawings, wherein:
FIG. 1-1b shows longitudinal sections through the embodiment of the writing implement in the rest, shift and writing phase,
FIG. 2 is an enlarged plan view of one of the two semi-shell-shaped intermediate sleeves 104 of the writing implement of FIGS. 1-1b,
FIG. 3 is an enlarged plan view of a sealing shell 99 of the writing implement,
FIG. 4 is an enlarged longitudinal section through the pushbutton 101 of the writing implement,
FIG. 5 is an enlarged cross-section along line 5--5 through the closed closure tip of the writing implement of FIG. 1,
FIG. 6 is a further enlarged cross-section along line 6--6 through the closed closure tip of the writing implement of FIG. 1,
FIG. 7 is an enlarged cross-section along line 7--7 through the opened closure tip of the writing imp
REFERENCES:
patent: 290684 (1883-12-01), Hoffman
patent: 2111767 (1938-03-01), Gimonet
patent: 3196839 (1965-07-01), Bertoglio et al.
patent: 3362778 (1968-01-01), Pavese
patent: 3480370 (1969-11-01), Koeln
patent: 4533272 (1965-08-01), Sakai
patent: 4540300 (1985-09-01), Midorikawa
Apley Richard J.
Bender David J.
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