Patent ID: 7811084

Claim:
A steam shrink oven comprising mainly a conveyer belt to carry bottles, a pre-shrink oven, a shrink oven, a plurality of steam generators and a plurality of pipes, the pre-shrink oven and the shrink oven being located at positions where the conveyer belt travels according to a labeling process of the bottles, wherein: the pre-shrink oven has adjustable steam ejection ducts at two sides thereof each consists of a steam tube, a screw bar and an adjustment knob, the steam tube having a plurality of apertures, the screw bar having two sides coupling respectively with the adjustment knob and the steam tube; the shrink oven has steam nozzles at two sides each having a rotary knob to adjust the position thereof and a synchronous bar linking the steam nozzles at the two sides to simultaneously adjust the positions thereof; and the steam generators are located above the shrink oven to generate steam of different pressures that is delivered through the pipes to the adjustable steam ejection ducts of the pre-shrink oven and the steam nozzles of the shrink oven so that when the steam is sent to the pre-shrink oven heated air passes through the apertures to partially preheat and shrink a shrink film without dropping before a final shrinking process is finished, and the steam is ejected through the steam nozzles to shrink the shrink film on bottle bodies of the bottles; the shrink oven further having a protective lid at one side that has a viewing window formed thereon.