Transversal cutting equipment for trimming strips

A cutting apparatus comprising:

• a transversal cutting equipment for trimming strips of webs moving along a given direction, the transversal cutting equipment comprising:
• a trimming apparatus including:
• a stationary fixed trimming blade, and
• a trimming blade carrying cylinder supporting a movable trimming blade and rotatably mounted around a rotating axis;
• a vacuum source;
• a strip collector;
• and
• a separating transversal cutting device;
• wherein said trimming apparatus is disposed downstream from the separating transversal cutting device and operates in association with the separating transversal cutting device for executing transversal cuts on said webs defining basic sheets with respective transversal separation edges,
• wherein the movable trimming blade is provided for cooperating with the fixed trimming blade for separating transversal strips of the webs adjacent to the transversal separation edges, the trimming blade carrying cylinder includes a retaining sector adjacent to the movable trimming blade,
• wherein said retaining sector defines a plurality of suction openings connected to the vacuum source for retaining the strips by suction and dragging the strips up to the strip collector,
• wherein said equipment is used for cutting and separating transversal strips of two said webs overlapped in adherence jointly to form the basic sheets which are overlapped;
• and
• wherein said equipment further comprises
• a holing mechanism arranged upstream from the separating transversal cutting device for effecting holes transversely on one of the two webs and an electronic control unit for the trimming blade carrying cylinder and the holing mechanism,
• wherein, in use, the two webs overlapped in adherence are moved between the trimming blade carrying cylinder and the fixed trimming blade and include a first web and a second web of which the first web faces towards the trimming blade carrying cylinder and the second web faces towards the fixed trimming blade;
• wherein the holing mechanism is actuatable by the electronic control unit for forming a row of holes transversely to the first web, adjacent to each of the transversal separation edges, in order to position said row of holes on the first web close to the suction openings of the retaining sector of the trimming blade carrying cylinder in association with the cutting of the strips for a suction action on the second web;
• and
• wherein the suction action is such as to retain overlapped and in adherence on the retaining sector the strip of the first web and the strip of the second web in adherence on the strip of the first web during the cutting and the dragging of the strips up to the strip collector.