Spiral-shaped lamp for UV curing of coatings and bonding for a digital versatile disk (DVD) or compact disk (CD)
a technology of uv curing and spiral lamp, which is applied in the direction of glue vessels, other domestic objects, manufacturing tools, etc., to achieve the effects of reducing thermal buildup, improving edge curing, and reducing the intensity of uv energy
Inactive Publication Date: 2007-05-03
XENON CORP
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- Application Information
AI Technical Summary
Benefits of technology
The present invention is about a new system and method for manufacturing DVDs using a spiral lamp. The lamp has at least one circular turn, preferably in a spiral configuration, which provides a uniform intensity of UV energy to the disk without requiring relative motion between the disk and the lamp. A contoured reflector can be added to increase the intensity of UV energy and make it more uniform, while a mirror can be used to direct energy to the edge of the DVD for edge curing. The lamp can have one or more turns in different planes parallel to the workpiece to ensure a sufficient amount of energy gets to the edge and periphery. The spiral lamp improves edge curing while also minimizing thermal buildup and avoids the need to move the DVD relative to the lamp during processing.
Problems solved by technology
Another mirror can be used to help direct energy to the edge of the DVD for edge curing, as it has been found that this is an area that may not be sufficiently cured, especially in DVDs here two sides are bonded together.
Method used
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[0011] Referring to FIGS. 1 and 2, a spiral-shaped lamp 10 is used for curing a CD or DVD (again, such computer and video disks are referred to her collectively and generally as DVDs) during manufacture, such as when two parts of the DVD are bonded together, or when an overcoat (e.g., graphics on a disk) is to be cured Uv light is useful in such processes for providing curing of a bonding agent or an overcoat without providing excessive heat, a known benefit of pulsed light. Lamp 10 has an anode end 12 and a cathode end 14 for connection to an energy supply.
[0012] As shown in FIG. 1, lamp 10 is shaped in a spiral and is centered over the DVD in such a way that it provides minimal energy in the center of the disk where there is a hole and an unrecorded area, but more energy over the rest of the DVD. The spiral shape continues to the outer diameter of the disk area. FIG. 1 shows a total of two turns, although a single ring would be possible and more turns could be used. In addition, ...
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Abstract
A spiral-shaped lamp (10) is used for disk manufacturing processes, such as curing of coating or bonding, to provide uniform intensity of UV energy to the circular disk without requiring relative motion between the disk and the lamp during the curing process.
Description
CROSS-REFERENCE TO RELATED APPLICATION [0001] This application is a continuation of U.S. application Ser. No. 10 / 055,251, filed Jan. 11, 2002, entitled “SPIRAL-SHAPED LAMP FOR UV CURING OF COATINGS AND BONDING FOR A DIGITAL VERSATILE DISK (DVD) OR COMPACT DISK (CD),” now U.S. Pat. No. 7,150,806; which is a continuation of PCT / US99 / 26188 filed Nov. 4, 1999, which claims priority from U.S. Provisional Application Ser. No. 60 / 107,057, filed Nov. 4, 1998, all of which are incorporated herein by reference.BACKGROUND OF THE INVENTION [0002] The manufacturing of compact disks (CDs) and digital versatile (or video) disks (DVDs) for computer and video applications can include a number of processes, such as bonding in the case of DVDs and overcoat curing in either case, in which pulsed ultraviolet (UV) light can be used in the manufacturing process. The UV light source for providing the pulsed UV energy may be an arc lamp filled with xenon gas, thus generating significant UV energy. [0003] It...
Claims
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IPC IPC(8): B29C65/02B29C35/08B29C65/14B29C65/48G11B7/26H01J61/32
CPCB29C65/14B29C65/1406B29C66/45B29C66/80B29C2035/0827B29L2017/005G11B7/26H01J61/305H01J61/307H01J61/32H01J61/322H01J61/327B29C65/4845
Inventor PANICO, C. RICHARDPANICO, LOUIS R.
Owner XENON CORP