Web folding apparatus

Details

Inventors: Branecky, George N.; Roetter, Frank T.; Oeschger, Frank A.;
Assignee: Pitney Bowes Inc. (Stamford, CT)
Primary Examiner: Heinz; A. J.
Assistant Examiner:
Attorney, Agent or Firm: Walker; Donald P., Soltow, Jr.; William D., Scribner; Albert W.

For use in combination with a machine for feeding a web of paper in a downstream path of travel, there is provided apparatus for folding an unfolded web of paper along its longitudinally-extending weakened fold line. The apparatus comprises: a frame; web drag structure including a drag member which longitudinally extends across the path of travel of the unfolded web for frictional engagement by the web; a lower roller which is rotatably attached to the frame below the level of the drag member so as to extend transverse to the drag member and at an angle of approximately 95.degree. with respect to a vertical plane passing through the drag member, such that an unfolded web may extend downwardly in its path of travel from the drag member, into engagement with the lower roller and be gradually folded between them; and an output roller which is rotatably attached to the frame below the level of the drag member so as to extend transverse to the drag member and such that the folded web may extend from beneath the lower roller and into engagement with the output roller and the from beneath the output roller to the machine. In addition, the apparatus comprises web guiding structure including a pair of drag elements connected to the frame as to extend into engagement with the web between the drag member and lower roller, the drag elements being constructed and arranged for engaging the partially folded web on opposite sides of the fold line for pre-creasing the web along the fold line.

DETAILED DESCRIPTION For use in combination with a machine for feeding a web of paper in a downstream path of travel, there is provided apparatus for folding an unfolded web of paper along a longitudinally-extending weakened fold line thereof, said apparatus comprising: a frame; web drag means including a drag member longitudinally extending across the path of travel of an unfolded web for frictional engagement thereby; a lower roller, rotatably attached to the frame below the level of the drag member so as to extend transverse to the drag member and at an angle of approximately 95.
degree.
with respect to a vertical plane extending through the drag member, such that an unfolded web may extend downwardly from said drag member and into engagement with said lower roller and be gradually folded therebetween, an output roller rotatably attached to the frame below the level of the drag member so as to extend transverse to the drag member and such that said folded web may extend from beneath said lower roller to said output roller and into engagement therewith; and web guide means including a pair of drag elements connected to the frame as to extend into engagement with the web between the drag member and lower roller such that said elements engage the partially folded web on opposite sides of the fold line for pre-creasing the web along the fold line.

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