Web perforating apparatus

Details Web perforating apparatus Web perforating apparatus

1986-08-01

1987-09-08

Schran, Donald R.

Cutting

With means to stretch work temporarily

83343, 83346, 83660, B26D 714, B26D 162, B26F 120

Patent

active

046916067

ABSTRACT:
As a conditioning step for wrapping a plurality of articles in a low density polyethylene shrink film, perforations are formed in the shrink film for receiving machine elements utilized in performing the wrapping operation, the film being moved continuously between a pair of infeed rolls and a pair of outfeed rolls between which a rotatable mandrel is disposed and which includes perforating knives thereon for engaging the film while the film is moved continuously, the perforating knives being disposed on the opposite side of the web from a rotatable back up roll having cavities formed therein for receiving the ends of the perforating knives in such manner that the web is maintained under tension throughout the perforating process while the backup roll serves to prevent sidewise movement of the web due to web perforating action of the perforating knives.

REFERENCES:
patent: 3550826 (1970-12-01), Salmela
patent: 3565308 (1971-02-01), Slack
patent: 3902954 (1975-09-01), Lotto

Affiliated with

Also associated with

Rating

Web perforating apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Web perforating apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Web perforating apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2152252