Patent ID: 8137086

Claim:
A preform heating system having a movement mechanism making a support member able to rotate while the support member is supporting a plastic preform for forming a container by blow molding move over a predetermined path, heating devices provided along a heating region set on said path and heating said preform supported by said moving support member, and a control mechanism controlling a rotational state of said support member moving through said heating region and controlling an orientation of said preform with respect to said heating devices, wherein said control mechanism has a first magnetic pole member arranged along at least a part of said heating region and a second magnetic pole member fastened to said support member so that when said support member moves through said heating region, it faces said first magnetic pole member, and said support member moving through said heating region is made a rotational state determined by the relationship between the polarity of the first magnetic pole member and the polarity of the second magnetic pole member.