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US 4,072,076 AGranted
Punching apparatus
AssigneeTimsons Limited
InventorGeoffry R. H. Miles
Life of this patent
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AssigneeTimsons Limited
InventorGeoffry R. H. Miles
Estimating the term…
Apparatus for punching out a plurality of notches of successively different lengths in an edge portion of a travelling web formed by a pair of rotatable wheels between which the web travels. A plurality of cutting elements, each formed by a bridge-type member having a pair of limbs, are located on one of the wheels with the space between the pair of limbs of each bridge-shaped member being different. The other wheel carries a plurality of cutting punches, each of a size and arranged to fit between the pair of limbs of a bridge-shaped cutting element on the other wheel to provide a shearing action upon engagement with the limbs of a said cutting element.
An apparatus for punching out a plurality of notches of predetermined length in an edge portion of at least one travelling web, said apparatus comprising:
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
No related US applications are recorded in the indexed filing history.
Cutting work characterised by the nature of the cut made; Apparatus therefor: forming notches in marginal portion of work by cutting
Cutting: notching
Cutting motion of tool has component in direction of moving work: plural diverse flying cutters
With cooperating rotary cutter or backup: with radial overlap of the cutting members
Term ended 7 Feb 1995 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The present invention relates to an apparatus for punching out a plurality of notches in an edge portion of a travelling web or stack of webs of paper, board or the like, which notches are to form a step index in a book or booklet into which the web is to be made.
A book or booklet having a step index consists of a plurality of notches cut symmetrically on the fore-edge of a book, the paper leaf of each step carrying marking denoting what the subsequent leaves in that section refer to.
Hitherto, when books or booklets having a step index were produced, a plurality of separate tools have been used at separate punching stations to punch out the different lengths of notches which are necessary for each index. Clearly the length of the apparatus required to produce the notches is long because of the use of a plurality of spaced stations. The invention seeks to avoid this disadvantage.
The invention will now be described further by way of example with reference to the accompanying drawing the single FIGURE of which shows a partly broken-away, perspective view of an apparatus in accordance with the invention.
In the drawing two-co-operating wheels are designated 10 and 12. An edge of the wheel 12 is recessed at 14 and a plurality of spaced cutting elements 16 are removably mounted in the recess. Each element 16 is segmental and includes a substantially bridge-shaped portion the arms 20 of which define cutting teeth 22 with which a respective cutter blade or punch 24 mounted in an annular groove 26 on the wheel 10 co-operates.
It will be seen that as a web or a stack of webs of paper, board or the like 28 is passed between the wheels 10 and 12 notches 30 are punched out from an edge thereof by a scissor-like cutting action between the elements 16 and the blade or punches 24. The notches punched out are of different lengths to enable the web or webs to be assembled into a book or booklet down-stream of the apparatus shown.
For the sake of illustration the individual pages of a booklet are shown in dotted lines to make it clearer that the notches 30 are of successively decreasing lengths, shown as a, b and c.