초록 ▼

A labeling machine for successively applying flexible plastic labels to round containers, such labeling machine incorporating equipment to sever labels from a web of indefinite length thereof, to apply a leading edge of each of such labels to the periphery of a rotating vacuum drum, heating the lead

A labeling machine for successively applying flexible plastic labels to round containers, such labeling machine incorporating equipment to sever labels from a web of indefinite length thereof, to apply a leading edge of each of such labels to the periphery of a rotating vacuum drum, heating the leading and trailing edges of each such label while on the rotating vacuum drum by directing warm air thereagainst to heat such leading and trailing edges to a temperature at which the material therein becomes self-adhesive, and bringing the heated leading edge of the label on the vacuum drum into contact with a container rolling along a curved surface at a label transfer station to cause the label to transfer to the container and to eventually wind itself around the rolling container, thereby causing the heated leading and trailing edges of the label to adhere to the container or, in the case of a label whose length exceeds the circumference of the container, to cause the trailing edge of the label to adhere to the overlapped leading edge thereof.

대표청구항 ▼

Apparatus for sequentially wrapping flexible thermoplastic labels around containers, each of said containers having one of each of said flexible thermoplastic labels wrapped therearound by said apparatus, each of said containers having a generally cylindrical body portion, each of said flexible ther

Apparatus for sequentially wrapping flexible thermoplastic labels around containers, each of said containers having one of each of said flexible thermoplastic labels wrapped therearound by said apparatus, each of said containers having a generally cylindrical body portion, each of said flexible thermoplastic labels being wrapped around the cylindrical body portion of one of said containers by said apparatus, said apparatus comprising: a rotatable vacuum drum; means for rotating said rotatable vacuum drum; means for providing a supply of said labels successively connected together in the form of a moving web from a coil of indefinite length; severing means adjacent said rotatable vacuum drum for repeatedly severing said moving web to form a supply of said labels disconnected from one another; means for sequentially advancing labels from said severing means to successively apply a leading edge of each of said labels against said rotating vacuum drum to be temporarily retained against said rotatable vacuum drum by virtue of the vacuum therein; means for directing a heated fluid against said leading edge and against a trailing edge of each of said labels while said each of said labels is retained against said rotatable vacuum drum to soften at least a portion of said leading edge and at least a portion of said trailing edge to an adhesive state; means for sequentially presenting a supply of said containers at a wrapping station; and means for sequentially transferring said labels from said rotatable vacuum drum to said body portions of said containers at said wrapping station while said at least a portion of said leading edge and said at least a portion of said trailing edge of each of said labels is still in said adhesive state, to effect sequential adhesion of said labels to said body portions of said containers.