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
PROVISIONAL SPECIFICATION
(See section 10 and rule 13)


TITLE OF THE INVENTION CFL basing machine
APPLICANTS
Crompton Greaves Limited, CG House, Dr Annie Besant Road, Worli, Mumbai 400 030, Maharashtra, India, an Indian Company
INVENTORS
Dipak Mahajan and Nagin C Rana, both of Crompton Greaves Ltd, Baroda Lamp Works, Crompton Greaves Limited, Padra, Vadodara, Gujarat, India, both are Indian Nationals
PREAMBLE TO THE DESCRIPTION
The following specification describes the invention


The present invention relates generally to a modified head of basing machine for CFLs.
Compact fluorescent lamp mainly comprises of two parts i.e. the gas-filled tube (fluorescent tube) and the magnetic or electronic ballast. The process of manufacturing CFLs is more complex and expensive than incandescent bulbs. The process includes cutting of the straight glass shells. The shells are then bent into a U shape. The tubes are washed in chemically purified water at a temperature of 65-75 degree centigrade. After washing, tubes are dried for about 25 minutes at a temperature of about 80 degree centigrade. A coating of fluorescent powder is a combination of phosphor (containing cafcium phosphate, aluminum oxide) and polyethylene oxide and dispersion agents. The tubes are dried and put in a baking machine that maintains a temperature of about 550 degrees centigrade. The ends of the glass tubes are cleaned and they are mounted on a sealing machine for locking the filament inside the tube. The filament is sealed inside the tube. The tubes are vacuumed in an exhaust machine and mercury and argon are introduced into the tubes while the cathodes are heated. After the process of vacummising, the fluorescent tube is cemented with the plastic ring using basing machine in which the cement is baked. In the general process of basing, the cemented ring is placed over fluorescent tube and for baking the cement both the parts is sent together to heaters. The basing machine used for cement baking broadly comprises a basing head, a slotted pin and electrical heaters. During the process of cement baking using the traditional design head of basing machine, there were several drawbacks attached to it. The major drawback with the existing design of the design head is that the contact
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between the plastic ring having concave surface and the basing machine head seat was a line contact. Because of which the plastic ring was not properly supported and resulting in tilting of plastic ring with respect to capsule, which destroys the outer aesthetic of the product. Another drawback of the traditional basing head lies with the bottom slotted pin, which was not fully supporting to the fluorescent tube, due to which the tube does not remain perpendicular uniformly. Another drawback is during loading of the cemented cap and the capsule at the basing machine head, there is always a fair chance of wrong loading by the operator to result in tilted cemented capsule. Another drawback it is not easy to clean the cement on the contact area, as it is inside the head.
To overcome the above mentioned drawback and many more, a proposed invention is disclosed herein a modified design of the head and slotted pin of the basing assembly.
An object of the invention is to provide a basing machine head for cementing compact fluorescent lamp fluorescent tube and the plastic ring having a flattened top surface with vertically mounted side support pins.
Another object of the invention is to provide a basing machine head for cementing compact fluorescent lamp fluorescent tube and the plastic ring with an additional side contact area.
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Yet another object of the invention is to provide a basing machine head for cementing compact fluorescent lamp fluorescent tube and the plastic ring with a better alignment of plastic ring by avoiding tilting of plastic rings with concave as well flat surface.
Another object of the invention is to provide a basing machine head for cementing compact fluorescent lamp fluorescent tube and the plastic ring with a facility of easy cleaning the machine head.
Yet another object of the invention is to provide a basing machine head for cementing compact fluorescent lamp fluorescent tube and the plastic ring by providing an improved bottom support to the fluorescent tube.
Another object of the invention is to provide a basing machine head for cementing compact fluorescent lamp fluorescent tube and the plastic ring, which provides better alignment of fluorescent tube by avoiding tilting of the fluorescent tube.
An object of the invention is to provide a basing machine head for cementing compact fluorescent lamp and the plastic ring, which can remove the defect of aesthetics of the product.
An object of the invention is to provide a basing machine head for cementing compact fluorescent lamp and the plastic ring, which can increase the overall productivity.

An object of the invention is to provide a basing machine head for cementing compact fluorescent lamp and the plastic ring, which do not need the skilled workmen to operate.
In accordance with the invention, said invention describes a mechanism to avoid tilting of plastic ring and capsule while cementing the capsule of the compact fluorescent lamp.
The said invention improves the alignment of the plastic ring by increasing the area of contact and utilizing the side support pins, thus further preventing tilting of cemented plastic ring.
The said invention is cost effective and easy to manufacture, assemble and provide improved quality of the cemented capsule. Further, the invention utilizes bottom support ring with screw latch to avoid the tilting of the capsule through the reduced clearance between the capsule and inside diameter of the basing machine head.
In accordance with the invention during the baking process the cemented plastic ring can be placed over compact fluorescent lamp capsule and can be put together in the basing machine head for the baking of the cement with the help of electrical heaters. The basing machine comprises horizontal rotating turret holding basing head and the electrical heaters to bake the cement applied over the plastic ring to join the fluorescent tube.
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As disclosed in the invention, after the baking process, it should be taken care that the plastic ring of the cemented fluorescent should not be tilted with respect to the vertical axis of the fluorescent tube, else it may create defect in the aesthetics of the product.
In accordance with the invention, in the modified design head, in addition to the line contact at the top edge, side surface contact is also provided to plastic ring having concave as well as flat surface to avoid the tilting of the cemented plastic ring and there by tilted cemented fluorescent tube. In the similar fashion the bottom slotted pun is replaced with the full supported ring and the clearance between capsule and the inside diameter of the basing machine head is reduces to avoid tilting of the capsule. The design modification also helps in cleaning the cement fallen over the line contact of the plastic ring and basing machine head.
Dated this 19th day of March 2009

(Ivan Bernard Fuller)
ofKhaitan&Co
Agent for the Applicants
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