FORM 2
THE PATENTS ACT, 1970
(39 OF 1970)
As amended by the Patents (Amendment) Act, 2005
&
The Patents Rules, 2003
As amended by the Patents (Amendment) Rules, 2006
COMPLETE SPECIFICATION
(See section 10 and rule 13)
TITLE OF THE INVENTION
A sealing pin for a sealing machine for making lamps and a sealing machine
thereof.
APPLICANTS
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400030, Maharashtra, India, an Indian Company
INVENTORS
Mukhekar Jaykrishna Parshuram and Kumaraswamy Konamki Kanakadriah of Crompton Greaves Ltd., Baroda Lamp Works (BLW), Village Kural, Padra Jambusar Road, Padra Taluka, Vadodara- 391430, Gujrat, India; both Indian Nationals.
PREAMBLE TO THE DESCRIPTION:
The following specification particularly describes the nature of this invention and the manner in which it is to be performed.

FIELD OF THE INVENTION:
This invention relates to the field of mechanical assemblies and mechanical engineering.
Particularly, this invention relates to the field of equipment, assemblies, and machines for lamp sealing.
More particularly, this invention relates to sealing machines for making HID lamps.
Specifically, this invention relates to a sealing pin for a sealing machine for making lamps, and a sealing machine thereof.
BACKGROUND OF THE INVENTION:
Sealing machines is a machine for sealing-in of mounts in an incandescent bulb. The mounts include an exhaust tube which is located in a hollow shaft neck region of a bulb for allowing communication with the atmosphere.
A bulb includes a glass enclosure having a neck member with a mount element. The mount element needs to be centred in the glass shell so as to form an effective and accurate bulb assembly.
According to the prior art, a sealing pin was provided which sealing pin had improper slots for glass shell cutting air provision in the sealing machine. This resulted in improper cutting of glass shell during moulding process of bulbs.

Consequently, this results in bad quality of lamps and rejections of lamps under quality control procedures. Also, it results in relatively more glass shell shrinkage due to improper cutting of air.
PRIOR ART:
KR100816858 discloses plural radial heat radiating grooves which are formed on the mounting surface of the stem support. It also discloses an upper surface of a stem support is used as a mounting surface. Plural radial heat radiating grooves are formed on the mounting surface of the stem support. Exact number of grooves is not specified. The matching of the air provision slots as per the slots in sleeve is also not specified.
GB730739 discloses that there are sixteen sealing heads which are indexed to same number of exhausting heads. However, centering problem is not avoided.
GB745296 reveals the use of concentric inner and outer sleeves respectively, with a longitudinal passage through the inner sleeve and one between the sleeves, this adjustment permitting accurate positioning of the mounts relative to the necks of the bulbs to which they are to be sealed. However, it does not disclose means and mechanisms for accurate centering.
According to JP56003942, the mount formed is held by a sealing device consisting of the sealing head and the exhaust head situated in the rare portion in line with the head and is made to coincide with a valve as such for sealing up, discharging

exhaust gas, and sealing off for exhaust pipe. The art of matching slots is not
disclosed.
GB196591 explains the use of a mount having a longitudinally - extending exhaust
tube, and a hollow shaft is provided for supporting the mount and allowing
unobstructed communication therethrough from the exhaust tube to the
atmosphere. However, centering or slot matching is not disclosed.
US 1989897 states that, it is in the nature of a thin walled tube or cylinder, the upper end of which extends considerably above the second sleeve, where it is provided with a hollow end piece at the top of which is attached a top piece, also cylindrical, its upper edge being shaped and located to receive and support the lower or flared end of the lamp stem, as indicated. The top piece or stem support is hollow and serves to conduct an air stream into the lamp stem element at certain times, as will be described; and it has perforations or orifices conducting air into the lamp stem element; such air serving to assist in cutting off the lower portion of the bulb, and at other times to effect cooling. However, the provisioning of slots for matching is not explicitly disclosed.
There is a need for an improved sealing pin for a sealing machine, and an improved sealing machine, thereof.
OBJECTS OF THE INVENTION:
An object of the invention is to manufacture and provide relatively better quality of bulbs.

Another object of the invention is to reduce wastage of bulbs during manufacturing of bulbs using a sealing machine.
Yet another object of the invention is to arrest glass shell shrinkage during manufacturing of bulbs using a sealing machine.
Still another object of the invention is to provide appropriate cutting of air during manufacturing of bulbs using a sealing machine.
An additional object of the invention is to provide mount seating arrangement on sealing pin for proper centering of mount with glass shell during manufacturing of buJbs using a sealing machine.
Yet an additional object of the invention is to provide accurate centering of mount of a bulb on a sealing pin of a sealing machine.
SUMMARY OF THE INVENTION:
According to this invention, there is provided a sealing pin for a sealing machine for making lamps, said sealing pin being a cylindrical member with a flange member at its operative top portion, said sealing pin comprises:
a) an extended tip or a mounting pin rising above said flange portion at the operative top of said sealing pin, thereby providing a mount seating arrangement for effective centering of mount with a glass shell of a bulb in an accurate manner; and

b) plurality of air provision slots, equi-angularly displaced about a radial axis of said sealing pin, which slots match slots provisioned in a sleeve portion of the mount.
According to this invention, there is further provided a sealing machine with a sealing pin for making lamps, said sealing pin comprises: i. an extended tip or a mounting pin rising above said flange portion at the operative top of said sealing pin, thereby providing a mount seating arrangement for effective centering of mount with a glass shell of a bulb in an accurate manner; and ii. plurality of air provision slots, equi-angularly displaced about a radial axis of said seating pin, which slots match slots provisioned in a sleeve portion of the mount.
Preferably, said plurality of air provision slots are four air provision slots.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
Figure 1 illustrates a front view of a sealing pin of the prior art; and
Figure 2 illustrates a cross-sectional view of the sealing pin of the prior art of Figure 1.
The invention will now be described in relation to the accompanying drawings, in which:

Figure 3 illustrates a front view of a sealing pin;
Figure 4 illustrates a cross-sectional view of the sealing pin of Figure 3; and
Figure 5 illustrates a top view of the sealing pin of Figure 3.
DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS:
Figure 1 illustrates a front view of a sealing pin of the prior art.
Figure 2 illustrates a cross-sectional view of the sealing pin of the prior art of Figure 1.
The sealing pin (100) is a substantially elongate cylindrical element (12) with a flanged top (14). A mount seating arrangement is done on the sealing pin during manufacturing of bulbs using a sealing machine. Effective centering cannot be achieved using this sealing pin.
There are air provision slots (16) provided. The prior art sealing pin includes three numbers of such slots radially dispersed about a radial axis. These slots are not matching the mount of the bulb and hence results in cutting off the air provision, thereby resulting in relatively bad quality bulbs.
According to this invention, there is provided a sealing pin (200) for a sealing machine for making lamps, and a sealing machine thereof.
Figure 3 illustrates a front view of a sealing pin.

Figure 4 illustrates a cross-sectional view of the sealing pin of Figure 3. Figure 5 illustrates a top view of the sealing pin of Figure 3.
In accordance with an embodiment of this invention, there is provided an extended tip (22) or a mounting pin which rises above a flange. This provides a mount seating arrangement which is provided for centering of mount with glass shell in an accurate manner. Effective centering is thus achieved.
In accordance with another embodiment of this invention, there is provided a plurality of air provision slots (24), equi-angularly displaced about a radial axis of the sealing pin, which slots match the sleeve slots as per slots provision in sleeve. These improvements in design result in better quality of manufactured bulbs, Preferably, there are four numbers of air provision slots.
The technical advance of the current invention lies in improving the quality of
bulbs that are manufactured by means of:
provisioning of a sealing pin with an extended tip or a mounting pin which rises above a flange with mount seating arrangement which is provided for centering of mount with glass shell in an accurate manner; and provisioning a plurality (four numbers) of air provision slots which match the sleeve slots as per slots provision in sleeve,
This results in shrinkage reduction and better quality of lamps that are manufactured.

While this detailed description has disclosed certain specific embodiments of the present invention for illustrative purposes, various modifications will be apparent to those skilled in the art which do not constitute departures from the spirit and scope of the invention as defined in the following claims, and it is to be distinctly understood that the foregoing descriptive matter is to 6e interpreted merely as illustrative of the invention and not as a limitation.

We claim,
1. A sealing pin for a sealing machine for making lamps, said sealing pin being a
cylindrical member with a flange member at its operative top portion, said
sealing pin comprising:
a) an extended tip or a mounting pin rising above said flange portion at the operative top of said sealing pin, thereby providing a mount seating arrangement for effective centering of mount with a glass shell of a bulb in an accurate manner; and
b) plurality of air provision slots, equi-angularly displaced about a radial axis of said sealing pin, which slots match slots provisioned in a sleeve portion of the mount.

2. A sealing pin as claimed in claim 1 wherein, said plurality of air provision slots are four air provision slots.
3. A sealing machine with a sealing pin for making lamps, said sealing pin comprising:
i. an extended tip or a mounting pin rising above said flange portion at the operative top of said sealing pin, thereby providing a mount seating arrangement for effective centering of mount with a glass shell of a bulb in an accurate manner; and ii. plurality of air provision slots, equi-angularly displaced about a radial axis of said sealing pin, which slots match slots provisioned in a sleeve portion of the mount.

4. A sealing pin as claimed in claim 3 wherein, said plurality of air provision slots are four air provision slots.