Invention Application
- Patent Title: APPARATUS AND METHOD FOR STRETCHING AND TAKING-AWAY POLYMER FILMS
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Application No.: US15538775Application Date: 2016-12-16
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Publication No.: US20170361520A1Publication Date: 2017-12-21
- Inventor: Jeffery N. Jackson
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- International Application: PCT/US2015/066103 WO 20161216
- Main IPC: B29C55/08
- IPC: B29C55/08 ; B65G17/38 ; B65G17/32 ; B29C31/00 ; B65G15/46 ; B29C69/00 ; B65G47/08 ; B65G17/06 ; B29L11/00

Abstract:
A film (50) processing apparatus (20) including a film stretching device (22) and a take-away device (24). The take-away device receives the film after the stretching device and transports the film along a conveying region in a direction of transport (X). The take-away device includes opposing, first and second conveyor assemblies. The first conveyor assembly has a continuous belt driving a plurality of discrete pads (180a, 180b). Each pad forms a contact face (194a, 194b) extending between leading (200b) and trailing edges (202a). The pads are configured and arranged such that the trailing edge (202a) of a first pad (180a) overlaps the leading edge (200b) of an immediately adjacent second pad (180b) as the first and second pads traverse the conveying region. The overlap is characterised by a line (322) perpendicular to the direction of transport passing at any given moment through the first and second pads. A shape of the contact face can define a major central axis that is non-perpendicular and non-parallel with the direction of transport. The invention also relates to a method of processing a film using such an apparatus.
Public/Granted literature
- US10583603B2 Apparatus and method for stretching and taking-away polymer films Public/Granted day:2020-03-10
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