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1. EP0812671 - DEVICE FOR TRANSVERSELY EXTENDING A BELT-LIKE BODY

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

Claims

1. A device for transversely stretching a web (31), said device comprising a pair of pulleys (22, 22') arranged in the substantially same plane or arranged at an angle between them in a truncated inverted-V shape and rotating in the opposite directions to each other, and a pair of belts (23, 23', 47, 47') separately running around the pulleys (22, 22') and circulating via guide pulleys (25, 25', 26, 26', 48, 48', 49, 49', 50, 50', 51, 51'), respectively, wherein the web (31) is widthwise stretched, by gripping opposite side edges thereof by said pulleys (22, 22') and said belts (23, 23', 47, 47') and conveying the web (31) in a divergent manner, whereby at least one pair of pressing rolls (34, 34', 35, 35', 52, 52') is provided at an inclination relative to the belts (23, 23', 47, 47') for pressing the side edges of the web (31) onto the belts (23, 23', 47, 47') prior to being gripped between the pulleys (22, 22') and the belts (23, 23', 47, 47').
  2. A device for transversely extending a web (31) as defined by claim 1, characterized in that the pressing rolls (34, 34', 35, 35', 52, 52') are inclined to draw the side edges of the web (31) into a grip between the pulley (22, 22') and the belt (23, 23', 47, 47').
  3. A device for transversely extending a web (31) as defined by claim 1, characterized in that the pressing rolls (34, 34', 35, 35', 52, 52') are inclined so as to press the side edges of the web (31) onto the corners of the belts (23, 23', 47, 47').
  4. A device for transversely extending a web (319 as defined by claim 1, characterized in that holding means (37, 37', 39, 39') are arranged for independently movably supporting the pair of presser rolls (34, 34', 35, 35', 52, 52') in the widthwise direction of the web (31), and pressure applying means (41, 45) is arranged for pressing the pair of presser rolls (34, 34', 35, 35', 52, 52') onto the corresponding belts (23, 23', 47, 47') with an identical pressure.
  5. A device for transversely extending a web (31) as defined by claim 1, characterized in that the pair of belts (23, 23', 47, 47') are arranged to form divergent tracks in the web (31) running direction when the web (31) is introduced to the pulleys (22, 22').