Coating implements with material supply – Solid material for rubbing contact or support therefor – Including means to advance material
Patent
1982-12-13
1986-04-22
Bratlie, Steven A.
Coating implements with material supply
Solid material for rubbing contact or support therefor
Including means to advance material
401 65, 401 86, 401 89, B43K 2100, B43K 2300, B43K 3100
Patent
active
045838747
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE ART
This invention relates to a knock-type propelling pencil, and more specifically to a knock-type propelling pencil which makes it possible to supply the pencil with the new leads, when a writing lead accommodated in the propelling pencil in the form of a lead cartridge, is worn out.
BACKGROUND OF THE ART
In the conventional knock-type propelling pencils, spare leads are contained in a cylinder, and a new lead is readily propelled when the lead in use is worn out.
When the leads contained in the cylinder are all worn out, however, it is required to remove a knock rod from the rear end of the cylinder, take out a suitable number of leads from a separate lead container, and refill them into the cylinder, involving cumbersome operation. In particular, leads as thin as 0.5 to 0.3 mm must be treated very carefully, so that they are not broken away when they are being refilled, and so that they will not fall and will not be lost.
DISCLOSURE OF THE INVENTION
This invention was contrived in view of the above-mentioned problem inherent in the conventional devices, and its object is to provide a knock-type propelling pencil in which the lead container is constructed in the form of a cartridge which can be simply charged into the lead cylinder in the outer cylinder, so that the leads are refilled very easily.
According to one embodiment in the present invention, it is possible to realize a knock-type propelling pencil which has a lead cylinder in an outer cylinder, and which propels the lead contained in the lead cylinder by a lead-propelling mechanism upon the knocking operation, in which the knock-type propelling pencil is characterized in that a cartridge accommodation chamber 5 is formed in the rear portion of the lead cylinder, a lead cartridge consisting of a cylinder of which one end or both ends are sealed by caps is accommodated in the cartridge accommodation chamber, the lead cartridge having a diameter smaller than the inner diameter of the cartridge accommodation chamber and being capable of accommodating a required number of leads, and the cap at one end of the lead cartridge being removed, the lead cartridge is accommodated into the cartridge accommodation chamber so that the lead can be refilled.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a sectional side view showing, partly omitted, a lead cartridge of a knock-type propelling pencil according to an embodiment of this invention;
FIG. 2 is a sectional side view showing, partly omitted, the rear portion of the propelling pencil provided with the lead cartridge in FIG. 1;
FIG. 3 is a partial sectional side view showing the state in which the lead cartridge of FIG. 1 is charged into the propelling pencil of FIG. 2;
FIG. 4 is a sectional side view showing a lead-propelling mechanism in the front portion of the propelling pencil in FIG. 3; and
FIG. 5 is a sectional side view showing another embodiment according to this invention.
PREFERRED EMBODIMENT FOR USE OF THE INVENTION
The invention will be described below with reference to an embodiment in conjunction with the drawings.
In FIGS. 1-3 a lead cartridge 1 in the present invention is long enough to accommodate leads 2, and consists of a cylinder 6 of a diameter smaller then the inner diameter of a cartridge accommodation chamber 5 which is formed stretching from the rear end of a lead cylinder 4 in an outer cylinder 3, and caps 7, 8 for sealing both ends of the cylinder 6. The front end of cylinder 6 of the lead cartridge 1 is tapered or chamfered as shown at 6a in FIG. 3.
In this embodiment shown in the drawings, the cap 7 on one side is so formed as will serve as a knock rod. That is, the cap 7 comprises a knock portion 9 of a diameter nearly equal to that of the outer cylinder 3, a slide shaft portion 10 which slides along the inner peripheral surface at the rear end of the outer cylinder 3, a coupling shaft portion 11 of a diameter nearly equal to that of the cylinder 6, and a fitting portion 12 which fits to the end of the cylinder 6 to seal it.
In the diagrammed embodime
REFERENCES:
patent: 1442817 (1923-01-01), Moore
patent: 1576146 (1926-03-01), Sheldon
patent: 2287894 (1942-06-01), Lynn
patent: 4240759 (1980-12-01), Matsumoto
patent: 4247215 (1981-01-01), Leuthold et al.
patent: 4386865 (1983-06-01), Kageyama et al.
Bratlie Steven A.
Kabushikikaisha Kotobuki
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