Abstract: To provide a cool air cooling device for optical disks where cooling of disk substrates immediately after injection molding thereof can be performed efficiently and a number of disk substrates can be accommodated in a limited space. A cool air cooling device (4) for optical disks having transfer means for transferring disk substrates in their standing state, wherein the transfer means is provided with a plurality of feed screw shafts driven for synchronous rotation to support and place disk substrates at a plurality of points, and the pitch of the threads formed in the feed screw shaft differs according to the axial positions of the threads.

Abstract: An optical disk laminating method and an optical disk laminating device capable of shortening tact time is provided. The method comprises the steps of placing lower disks (D2) on chucks installed on a rotating table (1), placing upper disks (D1) over the chucks to be spaced from the lower disks (D2), applying, from the upper side, an adhesive agent to the upper disks (D1) on the chucks, reversing the upper disks (D1) applied with the adhesive agent, applying the adhesive agent to the lower disks (D2), stacking the upper disks (D1) on the lower disks (D2), carrying the stacked disks (D) manufactured in the previous step onto rotating stands (33A) and (33B) by a transfer arm (24) and spreading the adhesive agent, and carrying the stacked disks (D) having the adhesive agent spread on the rotating stands onto an ultraviolet radiating table (34) by the transfer arm (24) and curing the adhesive agent.

Abstract: A method for manufacturing an optical disc. The method includes the steps of peeling a release paper from a four layered adhesive sheet member, which is composed of an elongated release paper, a protective sheet attached to the release paper, an adhesive layer formed on the protective sheet, and a release paper formed on the adhesive layer. A three layered adhesive sheet member which results from the peeling of the release paper is applied to the single layered disc, the protective sheet is transferred and bonded to the surface of the single layered discs and the elongated release paper is peeled off from the protective sheet bonded to the single layered disc to expose the protective sheet on the upper side of the single layered disc.

Abstract: A high quality optical disc with extremely tiny bubbles or bubble less present in both disc-shaped substrates when they are laminated by means of an adhesive sheet in a operation process. The method includes bonding the adhesive agent to the surface of the lower disc-shaped substrate placing the upper disc-shaped substrate on the adhesive applied to lower disc-shaped substrate, pressurizing the upper disc-shaped substrate against the lower disc-shaped substrate by means of the pressing body, and exposing both the disk-shaped substrates to a high-pressure atmosphere. In a next operation process in which both the disc-shaped substrates are left to the inside of a high pressure atmosphere, firstly pressing body is permitted to press against the disc-shaped substrates to so enlarge or magnify the contact portion from the center side to the outside to render high-pressure atmospheric.

Abstract: A peeling apparatus including a holding table adapted to carry an optical disc composed of upper and lower disc-shaped substrates laminated to each other, a boss disposed centrally of the holding table which allows gas to blow between the disc-shaped substrates, and a suction means peripherally of the holding table to suck pulverized adhesive dust exhausted from the disc-shaped substrates when the two disc-shaped substrates are peeled from one another. The suction means is provided with a suction groove so formed to correspond to the periphery of the two disc-shaped substrates, and the holding table is provided with sucking and holding means for sucking and holding the two disc-shaped substrates.

Abstract: An adhesive agent is applied to both single plates, upper and lower, in which case the formation of bubbles is minimized by using a specified application manner. A method of laminating optical disks (D) comprising the steps of placing a lower disk single sheet (D1) on a turntable (1), applying an adhesive agent (R1) in doughnut form to the lower disk single sheet (D1), placing an upper disk single sheet (D2) on another turntable (2), applying an adhesive agent (R2) in doughnut form to the upper disk single sheet (D2), placing the upper disk single sheet (D2) on the lower disk single sheet (D1), and spreading the adhesive agent (% 2) between the two disk single sheets by rotating the turntables. Since bubbles hardly enter the adhesive agent, the bubble content of the adhesive agent after spreading is very small, and even after the curing subsequent to ultraviolet ray radiation, the air content of the optical disk can be minimized, the quality being high.

Abstract: An optical disk adhesive curing device wherein adhesive adhering to the lower surface of an optical disk having passed through the application and spreading process of the adhesive for the integration of the optical disk substrate constitutes no problem during the subsequent adhesive curing and finishing process.

Abstract: The invention intends to provide a method of manufacturing an optical disc capable of efficiently manufacturing a high quality optical disc by a consecutive product line, and to improve productivity in an injection molding step. The method is constituted by bonding two disc halves wherein a first disc half storing information therein and molded by a mold of a first injection molding unit and second disc half storing information therein, which information is different from that stored in the first disc half, and molded by a mold of a second injection molding unit are paired with and bonded to each other.

Abstract: This invention is purported to provide a method for manufacturing an optical disc in a simple and uniformly a protective layer on a single layered disc.

Abstract: This invention is purported to provide a method and an apparatus for precisely peeling both of disc-shaped substrates by a simple device without requiring a great peeling force.

Abstract: Provision is made for a method for manufacturing an optical disc with as lessened to the utmost and for the optical disc manufactured by that method.

Abstract: A method of and apparatus for curing an optical disc capable of efficiently curing ultraviolet curing resin serving as an adhesive between a pair of disc substrates. The apparatus includes a peripherally located ultraviolet irradiation unit disposed around a rotary holding table for irradiating ultraviolet from the peripheral surface of the optical disc toward the inner portion thereof so as to cure the ultraviolet curing resin, and/or a central irradiation unit disposed to irradiate ultraviolet from the central hole of the optical disc toward the outer portion thereof.

Abstract: A high quality optical disc with extremely tiny bubbles or bubble less present in both disc-shaped substrates when they are laminated by means of an adhesive sheet in a operation process. The method includes bonding the adhesive agent to the surface of the lower disc-shaped substrate placing the upper disc-shaped substrate on the adhesive applied to lower disc-shaped substrate, pressurizing the upper disc-shaped substrate against the lower disc-shaped substrate by means of the pressing body, and exposing both the disk-shaped substrates to a high-pressure atmosphere. In a next operation process in which both the disc-shaped substrates are left to the inside of a high pressure atmosphere, firstly pressing body is permitted to press against the disc-shaped substrates to so enlarge or magnify the contact portion from the center side to the outside to render high-pressure atmospheric.

Abstract: The invention intends to provide a method of manufacturing an optical disc capable of efficiently manufacturing a high quality optical disc by a consecutive product line, and to improve productivity in an injection molding step. The method is constituted by bonding two disc halves wherein a first disc half storing information therein and molded by a mold of a first injection molding unit and second disc half storing information therein, which information is different from that stored in the first disc half, and molded by a mold of a second injection molding unit are paired with and bonded to each other.

Abstract: A method of manufacturing an optical disc which is capable of speeding up the curing of an adhesive and capable of reducing an area or space occupied by a curing unit when manufacturing an optical disc, and a method of manufacturing an optical disc which is not susceptible to heat from a curing unit or a UV irradiation unit while an adhesive is cured. The method of manufacturing an optical disc includes a step of supplying lower and upper disc substrates, a step of spreading an adhesive between the lower and upper discs, and a step of irradiating the adhesive spread between the lower and upper discs with UV, wherein the irradiation step is performed on a turntable.

Abstract: A spreader of an optical disc capable of receiving an adhesive when first and second resin substrates are rotated at high speed in a spreading step in the case of manufacturing the optical disc, and capable of preventing the adhesive from being contaminated at the peripheries of the first and second resin substrates. The spreader of the optical disc for spreading the adhesive comprises the first resin substrate and second resin substrate, wherein the first and second resin substrates are laid on and bonded to each other by way of the adhesive and rotated together, a rotatable receiving platform on which the first resin substrate is placed, and a cover member for receiving the adhesive scattered from the first and second resin substrates when they are rotated. The spreader of the present invention can surely receive the adhesive interposed between the first and second resin substrates, which is scattered outward, and prevent the adhesive from being scattered therearound.

Abstract: A method of manufacturing an optical disc for uniformly spreading an adhesive at a region where the first and second resin substrates are bonded to each other at a portion close to central holes thereof, and a placing platform to be used by the same manufacturing method. The method of manufacturing the optical disc comprises coating the adhesive onto the first resin substrate, placing the second resin substrate on the first resin substrates, then spreading the adhesive while the first and second resin substrates are rotated at high speed, thereafter curing the adhesive thereby bonding the first and second resin substrates, wherein the adhesive is sucked from central holes of the first and second resin substrates so as to facilitate spreading of the adhesive at the central holes thereof. The placing platform of the optical disc to be used by the above method has a boss provided with suction means.