Abstract: A tension fluctuation absorbing device used in a cardboard sheet manufacturing apparatus and equipped with a tension fluctuation detection assembly and a tension adjustment assembly. The tension fluctuation detection assembly detects fluctuations in the tension generated in a material paper. The tension adjustment assembly is installed on the upstream side of the tension fluctuation detection assembly and adjusts the tension generated in the material paper by increasing or decreasing the feed-out speed of the material paper on the basis of fluctuations in tension detected by the tension fluctuation detection assembly.

Abstract: A pair of drawing members, separated by a prescribed distance, are rotated toward each other in contact with an end packaging material covering the ends of a web wrapped on a web roll. The drawing members are brought toward one another, creating an insertion section by gathering the end packaging and separating the end packaging from the web on the web roll. A cutting member is inserted into the insertion section. The web roll is then rotated, whereby the end packaging is cut and removed from an end of a web roll without damaging the web wrapped thereon. Similar drawing members and cutting members are preferably located at each end of an end packaging removal device, thereby simultaneously removing the end packaging material from both ends of the web roll. The resulting end packaging removal device saves time and labor involved in removing end packaging from a web roll.

Abstract: A cutting device and a wedge shaped separating member are used to cut a packaging material wrapped around an outer perimeter surface of a web roll. The separating member is inserted under the packaging material. A cutting blade is fixed above the separating member to provide for the cutting of the packaging material when the cutting device and separating member are moved along a lateral axis of the web roll. The cut packaging material is completely separated by a second cutting device. The separated packaging material is then rolled and compacted. The result is an automated device which saves time and labor when removing packaging material from a web roll. Furthermore, the removed packaging material is compact, providing for reduced storage and disposal space.