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Method and apparatus for producing pop-up booklets

  • US 4,468,020 A
  • Filed: 06/07/1982
  • Issued: 08/28/1984
  • Est. Priority Date: 06/07/1982
  • Status: Expired due to Fees
First Claim
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1. A method for manufacturing a plurality of pop-up booklets in a continuous, in-line process, said method comprising:

  • providing a continuous web of paper having a pair of longitudinal marginal parts and divisible into a plurality of web portions extending in end to end relation in a longitudinal direction on said web;

    advancing said continuous web downstream in a longitudinal direction along a predetermined path;

    providing a folding station at a first location on said path;

    folding one marginal part of said web into lapping relation with at least part of the remainder of the web, at said folding station, to provide at least part of the lateral dimension of said web with a double ply thickness downstream of said folding station;

    forming a longitudinal fold line on said web as a result of said folding step;

    providing a cutting station at a location on said path downstream of said folding station;

    cutting a predetermined pop-up outline on a web portion, through the double ply thickness thereof, to form one-half of the pop-up outline in each ply, as that web portion passes said cutting station;

    forming on said web portion, in conjunction with said pop-up outline, a perforated line extending through the double ply thickness of the web portion to form a pop-up fold line in each ply;

    said cutting step comprising forming, on each lap of the web portion, a pop-up outline-half extending from a pop-up outline midpoint at said longitudinal fold line, along the web, to a pop-up outline end;

    said step of forming said perforated line comprising forming, on each lap of the web portion, a pop-up fold line extending from said longitudinal fold line, at a location thereon longitudinally displaced from said pop-up outline midpoint, to an end of the pop-up outline, whereby each portion of said web which has undergone said cutting and forming steps includes a symmetrical pop-up defined by said pop-up outline and said pop-up fold lines, with the web'"'"'s longitudinal fold line extending through the middle of said pop-up;

    reverse folding said pop-up by urging it inwardly along that part of said longitudinal fold line extending through the middle of said pop-up;

    and then severing from the web each portion thereof containing a reverse folded pop-up;

    at the time of said severing step, each of said cutting, forming, reverse folding, and severing steps being performed on a respective portion of the continuous web simultaneously with the performance of each of the other steps.

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