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US 5,853,138 AGranted
Plastic film processing apparatus
OwnerChi-Ping Changinventor
Life of this patent
Estimating the term…
Abstract
A plastic film processing apparatus adapted for processing tiny pores in a plastic film, enabling it to be torn in any direction, the apparatus including two lifting blocks vertically adjusted by a respective adjusting screw, an impression cylinder revolvably mounted between the lifting blocks by bearings, a film transfer cylinder having fine grains raised from the periphery and peripherally disposed in contact with the impression cylinder for processing tiny pores in the plastic film passing through.
Claims6
An article processing apparatus for forming a plurality of perforations in a plastic article processed thereby comprising:
- (a) a machine base assembly;
- (b) a pair of substantially opposed lifting blocks coupled to said machine base assembly to be longitudinally displaceable relative thereto, each said lifting block having a central axle bearing portion;
- (c) an impression cylinder coupled to said axle said lifting blocks to extend axially therebetween, said impression cylinder having a pair of axially extended round pin portions on opposing ends thereof, said round pin portions respectively engaging said axle bearing portions of said lifting blocks, said impression cylinder having a substantially smooth sidewall portion;
- (d) a pair of adjusting screw means coupled to said machine base assembly and threadedly engaging said lifting blocks, respectively, for the longitudinal displacement thereof relative to said machine base assembly;
- and,
- (e) a transfer cylinder rotatably coupled to said machine base assembly, said transfer cylinder being disposed substantially adjacent said impression cylinder, said transfer cylinder including a perforating sidewall portion having formed thereon a plurality of grain projections adapted to perforate said plastic article upon engagement thereof against said sidewall portion of said impression cylinder.
3 more elements
Dependencies are inferred from the claim text.