Patent ID: 9296148
Filing Date: 2016-03-29
CPC Classification: B29B,B29C,B29K,B29L

Claim Text:
1. A method of heating a plastic preform for the manufacture of a container by forming it from the preform, the preform comprising a body and a bottom, comprising: a step of transporting the preform along a predetermined path with rotation of the preform about its axis; and a step of heating the preform along said path by means of infrared radiation sources disposed along said path, wherein the step of heating includes regulating power to the radiation sources so as to regulate the intensity of emitted radiation of the radiation sources to have a periodic character along the path, so as to heat selectively at least one angular section of the preform, along a principal axis of the preform, along the body and on the bottom of the preform, wherein the radiation sources are regulated to alternatingly emit zones of more intense radiation and emit zones of radiation of comparatively less intensity along said path.