초록 ▼

An apparatus and method for controlling the size and shape of a shrink film envelope around an article or a package to prevent the formation of wrinkles and bunching of the film when it shrinks. The apparatus comprises a hot air shrink tunnel having a conveyor for moving the article on packages thro

An apparatus and method for controlling the size and shape of a shrink film envelope around an article or a package to prevent the formation of wrinkles and bunching of the film when it shrinks. The apparatus comprises a hot air shrink tunnel having a conveyor for moving the article on packages through the tunnel. An assembly is position within the tunnel a preadjusted distance away from the article forming a fixed boundary to which the film envelope expands and is restricted, causing the air within the film envelope to be directed to areas around the article to keep the film from touching the article until the film shrinks. The assembly comprises material of low thermal conductivity such as a plurality of wooden wheels for contacting the film envelope.

대표청구항 ▼

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] Apparatus for heat shrinking an envelope of heat shrinkable film into close conformity to an article enclosed within the film envelope comprising:means for providing hot air around said envelope of he

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] Apparatus for heat shrinking an envelope of heat shrinkable film into close conformity to an article enclosed within the film envelope comprising:means for providing hot air around said envelope of heat shrinkable film while air within said film envelope expands and insulates said film from said article as said film shrinks;means for conveying said article through said hot air providing means;means for controlling the size and shape of said film envelope, as said film envelope enclosing said article travels through said hot air on said conveying means, to manipulate said film from touching said article and slowing the exhaust of said air within said film envelope prior to said film shrinking around said article; andsaid film envelope controlling means comprises an assembly positioned within said apparatus a fixed predetermined distance away from said article, said assembly forming a fixed boundary to which said film envelope expands and is restricted, causing said air within said film envelope to be directed to areas around said article to keep said film from touching said article until said film shrinks.