Abstract:
A repair machine for compact disk is used for cleaning, maintaining, and repairing compact disks. The processing procedure is basically a mechanical method by: placing a scratched compact disk on a CD turntable of the repair machine, grinding it with a grinding wheel and dripping grinding agent on the grinding wheel continuously. The grinding agent is classified in three categories: coarse, middle, and fine (polishing), for trimming scratch to renew a marred compact disk.

Description:
BACKGROUND OF THE INVENTION 
     This invention relates generally to repair machines for compact disk (CD), more particularly, it relates to a repair machine for compact disk by grinding and polishing to renew a scratched compact disk. 
     Accompanying the popularized multi-media and the Internet, the compact disk is boomed in the market, however, as the compact disk, irrespective of CD-ROM, VCD, or DVD, is prone to be scratched to bring about inconvenience in computer operation, such as skipping, frozen frame, mosaic phenomenon, or failure of reading data the worst, and besides, the compact disk is made of an unburnable, undecomposable and unrecoverable plastic material, the damaged compact disks will pollute the environment seriously for sure in the long run. Therefore, in view of the environmental protection, a repair machine for renew of the damaged compact disks is considered an indispensable tool nowadays. 
     After reviewing the present market, we have found most of the so-called repair machines for compact disk are essentially the CD cleaners, wherein part of them use wax to flatten dents, which, the wax, is usually cured in twenty minutes with limited effect, and the repaired CD may suffer a secondary scratch by carelessness. 
     On the contrary, this invention is to repair and renew a scratched CD mechanically by grinding and polishing to obtain a better result. 
     SUMMARY OF THE INVENTION 
     The primary object of this invention is to provide a repair machine for compact disk by grinding and polishing to renew a scratched CD. 
     Another object of this invention is to provide a repair machine for compact disk that serves in the meanwhile for a CD cleaner. 
     Yet another object of this invention is to provide a repair machine for compact disk for prolonging lifetime of the compact disk and for reducing environmental pollution. For more detailed information regarding this invention together with further advantages or features thereof, at least an example of preferred embodiment will be elucidated below with reference to the annexed drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The related drawings in connection with the detailed description of this invention, which is to be made later, are described briefly as follows, in which: 
     FIG. 1 is an elevational view of this invention in three-dimensions; 
     FIG. 2 is an exploded view of this invention in three dimensions; 
     FIG. 3 is a cutaway sectional view taken along line  3 - 3  in FIG.  1 ; 
     FIG. 4 is a cutaway sectional view taken along line  4 — 4  in FIG. 1; and 
     FIG. 5 is a cutaway sectional view taken along line  5 — 5  in FIG.  1 . 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     As illustrated in FIG.  1  and FIG.  2 —an elevational and an exploded view in three dimensions, a repair machine for compact disk of this invention comprises a casing  1 , a grinding unit  2  and a cooling unit  3  disposed on the casing  1 . 
     A power switch  121 , a heat dissipation switch  122 , and a timer  123  are arranged on a lateral plate  12  of the casing  1 , and the casing  1  is provided with a mantle  13 , wherein a plurality of vents  131  is perforated in a lateral wall of the mantle  13 , and a motor  14  is resided in the casing  1 , wherein a bearing  15  emerged from a platform  11  of the casing  1  is hitched onto a top rim of the motor  14 . 
     Regarding the grinding unit  2 , a base  21  is fixedly disposed on the platform  11 , wherein a protruding member  211  and a tapped through hole  212  are formed on top of the base  21  and in the protruding member  211  respectively. A sliding groove  221  is formed in bottom face of a sliding seat  22  striding the protruding member  211 , and a bolt stud  224  penetrates a guide hole  222  in the sliding seat  22  (shown in FIG. 5) to joint with the tapped through hole  212  so as to combine the sliding seat  22  with the base  21 . Further, a swivel knob  223  is arranged at one end of the bolt stud  224 , and, a fixing groove  225 , a positioning groove  226 , and a snap-retaining groove  227  are offered to locate on the top face of the sliding seat  22 , wherein a through hole  228  is reserved in each of two lateral walls of the snap-retaining groove  227 . A pivotal joint socket  231  is provided at one end of a grinding crank  23  for pivotally jointing the grinding crank  23  to the fixing groove  225  of the sliding seat  22 , and a fixing terrace  232  is settled at the other end of the grinding crank  23 , wherein a tapped through hole  233  is centered in the fixing terrace  232  for penetratingly disposing a bolt stud  236 . A rotary knob  234  is arranged at one end of the bolt stud  236 , wherein a threaded portion  235  is formed at journal of the bolt stud  236  for screw-jointing with the tapped through hole  233 . Besides, a positioning block  237  having a lateral arc-shaped positioning groove  238  at one end is arranged protrusively on the bottom face of the grinding crank  23 , and a handgrip  239  is formed at the other end of the grinding crank  23  to facilitate pulling and turning of the grinding crank  23 . Moreover, a rotation socket  24  containing at least a bearing set  241  is collared onto the bolt stud  236 , in which a coupling portion  242  is formed at the bottom end of the rotation socket  24 . In a top face and a bottom face of a grinding wheel  25 , a coupling portion  252  for jointing with the coupling portion  242 , and a piece of grinding cloth  251  are disposed or attached respectively. A positioning unit  26  is penetratingly disposed in the foregoing snap-retaining groove  227  with an eccentric positioning portion  261  exposed to air, wherein a turning knob  262  is formed at one end of the positioning unit  26 . A CD turntable  27  is fixedly jointed with the casing  1  by plugging a pivot pin  272  in the bearing  15 , wherein a resilient sheet  271  is laid flat on the top face of the turntable  27 , and a fixing unit  274  is screw-jointed to a tapped hole  273  of the turntable  27  for clamping a compact disk. 
     Furthermore, the cooling unit  3  is disposed on the platform  11  of the casing  1  for cooling a CD working piece when grinding, wherein an air spout  31  of the cooling unit  3  is arranged facing the turntable  27 . 
     As shown in FIG. 3, when the grinding crank  23  is pulled down, the positioning portion  261  of the positioning unit  26  is retained at the positioning groove  238  of the positioning block  237 , and because of the eccentric structure of the positioning portion  261 , both the positioning groove  238  and the positioning portion  261  will attach to each other closely to position the grinding crank  23  stably when the rotation knob  262  of the positioning unit  26  is pulled and turned. 
     Referring to FIG. 4, when adjustment of grinding height is desired in compliance with differently thickened CDs  4  and different processing procedures, all a user has to do is turn the rotary knob  234  of the grinding crank  23  and decide the engagement length between the threaded portion  235  and the tapped through hole  233 . 
     Moreover, as illustrated in FIG. 5, in compliance with differently sized CDs  4 , a user is supposed to turn the swivel knob  223  of the sliding seat  22  so as to create a horizontal displacement of the grinding crank  23 . 
     Also, the rotation socket  24  may be equipped with a motor so that the grinding wheel  25  of the grinding unit  2  can rotate automatically. 
     Besides, in compliance with different scratched degrees of CDs  4 , the grinding wheel  25  may be classified in grades, such as coarse grinding, fine grinding, polishing, etc with proper associated grinding and polishing agents. 
     According to the abovesaid, the features of this invention may be summarized as the following: 
     1. A scratched CD is reduced and renewed mechanically by grinding and polishing with better efficacy. 
     2. This invention is implemented for both the maintenance and the clean purposes of a scratched CD. 
     3. This invention is used to prolong lifetime of a CD and reduce environmental pollution as well. 
     In realizing the function of this invention, a scratched CD is put on the platform of this invention, then ground and polished for being reduced and renewed as described above. 
     Although, this invention has been described in terms of preferred embodiments, it is apparent that numerous variations and modifications may be made without departing from the true spirit and scope thereof, as set forth in the following claims.