Patent ID: 8641408

Claim:
A device for stretching film sections in a monoaxial or biaxial manner preferably by means of a stretching frame, for films ( 7 ) which are preferably made essentially from polymers, wherein a square or rectangular section of such a film is seized at four sides by at least two tenter hooks ( 15 ) each, characterised in that an upper tenter hook part ( 11 ) is mounted in an articulated manner on a rotational axis located outside the film to be stretched, and more precisely such that a lower, fixed tenter hook part ( 13 ) carries a joint, while an upper tenter hook part ( 11 ) is designed so as to pivot upwards, and at least one cylinder ( 14 , 16 ) is disposed horizontally on a vertical web rotated through 90° for applying tensioning power and thus applies the tensioning power to the upper, pivotable tenter hook part ( 11 ), and that a plurality of tensioning cylinders ( 14 , 16 ) disposed horizontally beside one another are disposed axially offset on the respective tenter hook, for example in such a way that a first tensioning cylinder ( 14 ) for example is mounted on the first tenter hook with a short flange, a second tensioning cylinder ( 16 ) is mounted on the second tenter hook axially offset by the length of the first tensioning cylinder ( 14 ), a third tensioning cylinder is mounted on a third tenter hook with a short flange, and so forth.