Title:
HEATING DRUM FOR THERMAL TRANSFER AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2022/265278
Kind Code:
A1
Abstract:
The present invention relates to a heating drum for thermal transfer, comprising: a cylindrical outer tube; an inner tube having a diameter smaller than that of the outer tube, the inner tube being disposed inside the outer tube; a rotating shaft fixed to the center of the inner tube via a connecting member; a cover for sealing the space between the inner and outer tubes which are open outwardly, thereby forming a heat medium oil containing space; a heater fitted through the cover so as to heat the heat medium oil containing space; a cradle disposed between the inner and outer tubes so as to support the heater; a valve for controlling discharge of air inside the heat medium oil containing space; and heat medium oil filling the heat medium oil containing space. The heat medium oil partially fills the heat medium oil containing space. The air inside the heat medium oil containing space is forcibly discharged through the valve such that the inner pressure of the heat medium oil containing space is maintained lower than atmospheric pressure. According to the present invention, the heat medium oil is directly heated by the heater and is efficiently stirred such that heat is evenly transferred to the heat medium oil, thereby helping maintain the entire temperature of the heating drum to be uniform. This substantially lowers the ratio of defective products resulting from temperature differences.
Inventors:
JUNG SOONTAE (KR)
LEE SANGMIN (KR)
LEE HYEJIN (KR)
LEE SANGMIN (KR)
LEE HYEJIN (KR)
Application Number:
PCT/KR2022/007856
Publication Date:
December 22, 2022
Filing Date:
June 02, 2022
Export Citation:
Assignee:
KYUNGIL TECH CO LTD (KR)
International Classes:
B41F16/00; B41F31/00; B41F31/03
Foreign References:
| KR102079129B1 | 2020-02-19 | |||
| KR100750501B1 | 2007-08-17 | |||
| KR100996493B1 | 2010-11-24 | |||
| KR101469383B1 | 2014-12-04 | |||
| KR20140069151A | 2014-06-09 | |||
| JP2000273737A | 2000-10-03 |
Attorney, Agent or Firm:
LEE, Sangmoon et al. (KR)
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