US 4,226,149 AGranted

Apparatus for transversely severing or transversely perforating webs of material

AssigneeWindmoller & Holscher

InventorsRichard Feldkamper, Klaus Ginschel

Life of this patent

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Abstract

A machine for cutting or perforating webs of materials comprises a frame, a splined first shaft carrying a plurality of angularly spaced first tools and rotatable in the frame, a second shaft rotatable in the frame and parallel to the first shaft, supporting plates carried by the second shaft, a third shaft parallel to the first and second shafts and carrying a plurality of angularly spaced second tools for co-operating with the first tools, the third shaft being rotatable in the supporting plates eccentrically to the second shaft, a spur gear fixed to the third shaft, an intermediate gear in mesh with the spur gear loosely rotatable on one of the supporting plates, a central gear in mesh with the intermediate gear and mounted on the second shaft for rotation relatively to the supporting plates, a lever fixed to the central gear, an entrainment bolt on the lever selectively insertable in one of a plurality of holes which are provided in a swing arm at the same angular spacing as the first tools, the swing arm being rotatable on the second shaft and being selectively connectible by way of a crank rod either to a fixed pin or to a crank pin, an idler gear in the frame and carrying the crank pin, and a further gear secured to the second shaft and in mesh with the idler gear.

Apparatus for selectively transversely severing predetermined lengths of web material and for transversely perforating the web materials, the web materials being preferably paper webs used in the manufacture of paper sacks, comprising:

a frame;
a central shaft rotatably mounted in said frame;
end plates carried by and rotable about said central shaft;
a splined shaft mounted in said frame parallel to said central shaft;
a first plurality of angularly offset tools carried by said splined shaft;
a knife shaft rotably mounted in said end plates parallel to said central shaft;
a second plurality of angularly offset tools carried by said knife shaft, said first and second plurality of tools being selectively positionable to sever and perforate webs;
a spur gear concentric with and carried by said knife shaft for rotating said knife shaft;
an intermediate gear loosely rotatably mounted in one of said end plates for driving said spur gear;
a central gear engaged by said intermediate gear and carried by one of said end plates, said central gear being concentric with and rotatable about said central shaft;
a first lever having a first end connected to said central gear;
an entrainment pin carried by a second end of said lever;
a second lever freely rotable about said central shaft and having a plurality of arms with openings formed therein, the angular orientation of said arms coinciding with the angular orientation of tools carried by said knife shaft, said entrainment pin being selectively insertable into one of said openings;
a second spur gear freely rotable in said frame;
a crank pin eccentrically mounted on said second spur gear;
a third spur gear secured to said central shaft and meshing with said spur gear, the transmission ratio between said third spur gear and said second spur gear being selectable in dependence on the predetermined length to be severed;
a pin fixed with respect to said frame for holding said central gear stationary;
and
a crank rod for selectively connecting said second lever to said crank pin and said pin.

16 more elements

Facts

Application

05/904,311Filed 9 May 1978

Priority

DE 272292520 May 1977

Granted

7 Oct 1980

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

B26D 1/626
And is rotating about an axis parallel to the line of cut, e.g. mounted on a rotary cylinder: for thin material, e.g. for sheets, strips or the like
B31B 50/14
Making rigid or semi-rigid containers, e.g. boxes or cartons: cutting, e.g. perforating, punching, slitting or trimming
Y10T 83/4711
With means to render cutter pass[es] ineffective: with means to produce "mis-cut"
Y10T 83/4786
Constantly oriented tool with arcuate cutting path: cutting couple type

Abstract

Claims9