TITLE
A REFILL ADAPTOR
The present invention relates to a refill adaptor for ball point pens of varying
length to enable the use of mini tips made from 1.50- 1.65 mm wire diameter
instead of 2.00 - 2.30 mm wire diameter. The invention particularly relates to
a refill adaptor for a ball point pen using mini tips for making ball point pen
refills.
PRIOR ART
The commonly used types of ball point refills which are available in the
market can be broadly classified in two categories -
a) Refills using BIC style ball point pen tips, adaptor, refill tube and ink.
Ordinarily the shank diameter of such adaptor is usually around 4.00 mm.
b) Refill using ball point pen tips like Pilot, D6, D4, Ohto, Zebra etc., refill
tube or cartridge of 2.70 mm - 3.00 mm. outside diameter and ink. In this
refills there is no possibility to use mini- tips at present made from wire of
1.50 mm - 1.65 mm diameter.
In the conventional ball point pen, the tips are made of wires of brass or an
alloy of nickel and silver. Further the average diameter of such tips varies
between 2.00 mm and 2.30 mm. Thus the conventional ball point pen suffers
from inherent disadvantages, namely it requires extra or additional materials in
making the tips with bigger diameter wire than what is actually required in the
mini tips which is around 1.50 - 1.65 mm in diameter. Further no adaptor is
available in the market, which can accommodate tips made of lesser diameter
wire to make ordinary refills with the refill tube or cartridge having outside
diameter of 2.70 - 3.00 mm. This enhances the cost of making known types of
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ball point pen refills. Several attempts have been made to overcome these
difficulties but without success.
In known type of ball point pen using BIC style refills, refills are made using
adaptor, BIC style ball point pen tips, refill tube and ink. However, there is no
adaptor to accommodate tips made from wire in the range of 1.50 mm to 1.65
mm in diameter available in the market. This wire of lesser diameter not only
make the ball point pen much more economical compared to the conventional
ball point pens due to less amount of material required, additionally such
lesser diameter would allow the pen to more attractive to the customer.
It is known among persons skilled in the art that the main difference between
ordinary and BIC type tipped refills are as follows:
a. The tips used in BIC type is the BIC tip while the ordinary refills uses
Pilot, D6, D4, Ohto, Zebra or such other type of tips usually made
from 2.00 to 2.30 mm wire, the refill tube or cartridge outer diameter
being 2.70 to 3.30 mm and tip is directly mounted or inserted in refill
tube or cartridge containing ink.
b. There is no adaptor in the ordinary type of refills enabling it to use
1.50 -1.65 mm wire mini tips.
c. The BIC tube refills are front loading while the ordinary refills are rear
loading.
It has therefore been the endeavor of the Applicant to mitigate these
drawbacks of the conventional ball point pens and to make an ordinary ball
point pen refill using an adaptor for refill which enables usage of ball pen tips
of no less technical requirement but of less material and thereby reducing the
cost considerably.
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OBJECT OF THE PRESENT INVENTION
The object of the present invention is to produce an adaptor which enables use
of ball point pen tips made from 1.50 - 1.65 mm diameter wire of brass or
alloy of nickel and silver to make a refill for ball point pen using refill tube or
cartridge of 2.70 - 3.00 mm outside diameter.
Thus resulting in reducing the cost of the refill without any alteration in the
existing design of ball point pens or the ink quantity necessary for adequate
writing.
DESCRIPTION OF THE INVENTION
A refill adaptor for making ball point pens refills essentially comprising a
main body, comprising of a front portion and a rear shank portion , said front
portion and said rear shank portion are rigidly coupled together with a ring
member, said main body having a capillary hole throughout its length , said
front portion being provided with a front housing for holding the mini ball
point pen tip provided with a ball for smooth writing, the capillary provides
a ink channel, the internal diameter of which is selected to 0.8 mm and the
outer diameter of said capillary being selected to 1.8 mm for free flow of ink
from ink reservoir or refill tube or cartridge made from 2.70-3.00 mm tube
to the ball point tip .
A refill adaptor of the present invention has outside diameter of the front
portion of about 2.25 - 2.30 mm and inner hole diameter of the front portion of
about 1.55 mm.
A refill adaptor wherein the ball point pen tip of the refill is housed within the
housing of the front part so as to hold the ball point pen tip along the
longitudinal axis of the refill.
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The present invention therefore provides a new ball point pen refill using an
adaptor which is much more economical. Further such adaptor also saves the
cost of the material of the tip.
With the newly designed adaptor, one can use 1.50 -1.65 mm diameter wire
ball point pen tips in the ordinary refill where the outside diameter of the refill
tube is 2.70 - 3.00 mm, which was not possible without the present invention.
The advantage of the new adaptor is to use 1.50 - 1.65 mm diameter wires ball
point pen tips in the ordinary refills having outside diameter of the refill tube
as 2.70 -3.00 mm, thereby cutting cost as compared to 2.00 - 2.30 mm
diameter ball point pen tips.
BRIEF DESCRIPTION OF THE DRAWINGS
The refill adaptor of the present invention is described herein below with
reference to accompanying drawings, wherein
Figure 1 shows a side plan of the refill adaptor of the present invention;
Figure 2 shows a section of the refill adaptor of the present invention and
Figure 3 shows the refill adaptor of the present invention fitted with refill tube
and ball point pen tip.
With reference to accompanying drawings, the refill adaptor essentially
comprises a main body (10) essentially comprising two parts, a front part (15)
and a rear shank portion (20). The said front part (15) and rear shank portion
(20) are rigidly joined together with a ring member (25) having an aperture
(42).
Figure 2 shows that the refill adaptor of the present invention is provided with
a front face (30) having a hole (35), which continues from the front face of
the refill adaptor and extends till the end of the rear shank (20). The internal
diameter of the hole (35) is wider in the front (1.50 mm - 1.55 mm) and
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narrower in the rear portion. The diameter of the shank (20) is about 0.8 mm
while the outer diameter of the shank (20) is around 1.8 mm. The front part
(15) of the refill adaptor holds the tip of the refill (55) having a ball which is
provided with a uniform capillary tube (40) for holding ink as shown in Fig 3.
The other end of said capillary is kept open for the uniform flow of ink
through the said ink channel (40) to the ball point (65).
It will be apparent from the Drawings that the adopter is used in relation to
ordinary type of refill of ball -point pens having the refill fitting hole diameter
of 2.30 - 2.40 mm for the fitment of refill in the ball point pen .
It will be appreciated that the refill adaptor as described herein above may be
subject to improvement and / or modification which is well within the
knowledge of a person skilled in the art. Any such modification or
improvement of the adapter of the pen is also intended to be covered within
the ambit of the present invention.
BIC is a trade name of BIC Corporation, France.
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WE CLAIM:
1. A refill adaptor for use in ball point pens refills essentially comprising
a main body (10), comprising of a front part (15) and a rear shank
portion (20), said front part (15) and said rear shank portion (20) being
rigidly coupled together with a ring member (25); said main body (10)
having a capillary tube (40) throughout its length, said front part (15)
being provided with a front housing (35) for holding the refill tip (55)
provided with a ball point (65) for smooth writing, said capillary tube
being provided with a ink channel, the internal diameter of which is
selected to be 0.8 mm and the outer diameter of said capillary being
selected as 1.8 mm for easy flow of ink from ink reservoir to said ball
point(65).
2. A refill adaptor as claimed in Claim 1 wherein the said front part (15)
of the refill adaptor is provided with a front face (30) housing (35) for
holding the ball point pen tip.
3. A refill adaptor as claimed in Claim 1 or 2 wherein said ring member
(25) integrally connects said front part (15) and said rear shank
portion (20) of said refill adaptor having an aperture (42) for the free
flow of ink through said capillary ink channel (40).
4. A refill adaptor as claimed in any of the preceding Claims wherein said
refill tip (55) is push fitted to the capillary ink channel (40) so that the
entire length of the capillary ink channel is telescopically fitted to
said refill adaptor without any obstruction.
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5. A refill adaptor substantially as herein described and as illustrated in
the accompanying drawings.
Dated this 02nd day of May 2008
M K CHAKRABARTI
of MKC & Associates
Applicant's Attorney
A refill adaptor for use in ball point pens essentially comprising a main
body (10), comprising of a front part (15) and a rear shank portion (20).
The front part (15) and said rear shank portion (20) are rigidly coupled
together with a ring member (25); and said main body (10) having a
capillary tube (40) throughout its length. The said front part (15) is
provided with a front housing (35) for holding the refill tip (55) provided
with a ball point (65) for smooth writing, said capillary tube being
provided with a ink channel, the internal diameter of which is selected to
be 0.8 mm and the outer diameter of said capillary being selected as 1.8
mm for easy flow of ink from ink reservoir to said ball point (65).