Assembly and method for realizing in continuous covering jackets of different dimensions starting from a film wrapped up in a coil
AssigneeSITMA MACHINERY S.p.A.
InventorsAris Ballestrazzi, Lamberto Tassi
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Abstract
An assembly for realizing in continuous covering jackets of book elements of different dimensions starting from a film wrapped up in a coil. The assembly includes a mechanism for cutting the film unrolling from the coil for realizing pieces of the film; a first folding device of a first end of the pieces; a second folding device of a second end of the pieces; a control and command unit and a longitudinal welder suitable for both superiorly and inferiorly closing folded pockets and for regulating the height of the cover itself by trimming the parts in excess.
Claims16
An assembly for creating a plurality of different sized continuous covering jackets for respective book elements having different dimensions, the plurality of different sized continuous covering jackets starting from a film wrapped up in a coil, said assembly comprising:
- a cutting device having a movable blade to cut said film unrolling from said coil to provide pieces of said film, each piece having a first end and a second end;
- a first folding device configured to form a first fold at a distance from a position of said first end of each of said pieces of said film;
- a second folding device configured to form a second fold at a distance from a position of said second end of each of said pieces of said film;
- and
- a control and command unit configured to:
- receive predetermined dimensions for each respective book element of said plurality of book elements, said predetermined dimensions comprising a height dimension and a width dimension for each respective book element, and
- control said cutting device and at least one of said first and second folding devices according to said predetermined dimensions of each of said book elements such that said first and second folds are distanced from each other based on the height dimension and the width dimension received for each respective book element to form each respective continuous covering jacket, wherein said first folding device comprises a first pair of rollers spring biased in mutual contact with each other in order to provide a first calendar passage for said film, and a first movable folding knife which moves into contact with the film at said distance from the position of the first end and continues movement to force said film, in opposition to said spring bias, into said first calendar passage to form said first fold.
A method for creating a plurality of different sized continuous covering jackets for respective book elements having different dimensions, the plurality of different sized continuous covering jackets starting from a film wrapped up in a coil, said method comprising:
- cutting said film unrolling from said coil to provide pieces of said film each piece having a first end and a second end;
- forming a first fold at a distance from a position of said first end of each of said pieces of said film;
- forming a second fold at a distance from a position of said second end of each of said pieces of said film wherein at least one of said forming a first fold and said forming a second fold comprises moving a knife into contact with the film at said distance from a position of a respective end, and continuing movement of the knife to force the film into a calendar formed by rollers which are spring biased in mutual contact, such that the film folds about opposing sides of the knife;
- receiving in a command and control unit predetermined dimensions for each respective book element of said plurality of book elements, said predetermined dimensions comprising a height dimension and a width dimension for each respective book element, and
- coordinating with the control and command unit said cutting and said forming a first and second fold according to predetermined dimensions of each of said book elements such that said first and second folds are distanced from each other based on the height dimension and the width dimension received for each respective book element to form each respective continuous covering jacket;
- longitudinally welding said film folded in order to close said folded ends and to regulate a height of said film according to the predetermined dimensions of said book elements.
Dependencies are inferred from the claim text.