摘要 |
PCT No. PCT/JP96/02182 Sec. 371 Date Feb. 4, 1998 Sec. 102(e) Date Feb. 4, 1998 PCT Filed Aug. 2, 1996 PCT Pub. No. WO97/06001 PCT Pub. Date Feb. 20, 1997When a heat transfer pattern comprising a plurality of recesses is formed on a surface of a roll to provide a thermal transfer roll, a metallic sheet is heated by the thermal transfer roll to form a laminate plate and an integral drum-bottom type can is made of the laminate plate, ring-shaped scratches due to the thermal strain are produced on portions of the can which face recesses of the laminate plate. Bubbles are liable to be formed on the scratches so that corrosion resistance around the bubbles is degraded. The invention has its object to provide a thermal transfer roll free from such scratches. In the invention, a conventional transfer roll having a plurality of recesses formed in a surface thereof is covered by a thin metallic sleeve (130) over a substantially entire surface thereof. Alternatively, the recesses (106) are closed by a cover body (132). While spaces in the recesses serve as heat resistance to form a similar heat transfer pattern to a conventional one, a surface of the roll is made flat to prevent scratches from being produced on a laminate plate.
|