Back to results
US 4,534,927 AGranted
Method and apparatus for manufacturing cups having a lip
AssigneeSekisui Kaseihin Kogyo Kabushiki Kaisha
InventorsKazumasa Morioka, Toru Yoshimi
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSekisui Kaseihin Kogyo Kabushiki Kaisha
InventorsKazumasa Morioka, Toru Yoshimi
Estimating the term…
A method and apparatus for manufacturing a cup formed of a thermoplastic resin foamed sheet material and having a lip, the side wall and bottom of the cup being integrally formed, the lip extending outwardly from the mouth portion of the cup and being bent at its end radially inwardly towards the side wall. The method includes forming a rim extending outward from the mouth portion of the cup and having a downwardly extending end, providing a bending furrow on the outer periphery of the side wall at a level below the rim, and bending the rim, as it is heated, at the bending furrow. The apparatus comprises a mandrel block adapted to hold cups and rotatable and axially slidable, a hot blade or cutting blade movable toward the mandrel block and adapted to form a bending furrow for bending the rim, and a lip forming tool having a lip forming groove adapted to be heated.
A method of manufacturing cups having a lip, which comprises the steps of:
An apparatus for manufacturing cups having a lip, including means for forming a lip on a pre-formed cup made from a thermoplastic resin formed sheet material and having a side wall and a bottom integrally formed therewith and a radially outwardly extending rim provided at the top of an opening defined by the side wall, said means comprising cup supply means for feeding the pre-formed cup, cup holding means being rotatable and axially slidable as it holds the pre-formed cup for holding each pre-formed cup, bending-line forming means movable toward the pre-formed cup held by the cup holding means and adapted to melt-form a bending furrow on the outer periphery of the side wall of the pre-formed cup, lip forming means having a lip forming groove adapted to receive the rim of the cup and provided with heating means, and cup removal means for removing the cup from the cup holding means.
Dependencies are inferred from the claim text.