Method and apparatus for forming and gripping a web beginning of a replacement roll
AssigneeMAN Roland Druckmaschinen AG
InventorsNorbert Dylla, Michael Worner
Life of this patent
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Abstract
A method and an apparatus for forming and gripping a beginning of a web of a replacement roll. At least one suction ledge is placed on an outer layer of the roll in a position in which the suction ledge extends parallel to the axis of the roll. The outer layer is raised by the suction ledge so that the outer layer is tensioned. The tensioned outer layer is cut parallel to and on the waste paper side of the suction ledge. Finally, the web beginning is lifted off by the suction ledge.
Claims23
A method of forming and gripping a new beginning of a web of a replacement roll including an outer web layer and having an axis, the method comprising the steps of:
- a) providing a support having support arms directed at the replacement roll;
- b) arranging at least one suction ledge on the support between the support arms;
- c) placing the at least one suction ledge and the support arms on the outer layer so that the suction ledge extends parallel to the axis of the roll, the suction ledge having a first side in close proximity to one of the support arms of the support and an oppositely directed second side;
- d) raising the outer layer with the suction ledge, so that the outer layer is tensioned;
- e) cutting the tensioned outer layer parallel to the suction ledge on the second side of the suction ledge;
- and f) lifting off the outer layer with the suction ledge, steps d)-f) being carried out between the support arms of the support.
An apparatus for forming and gripping a new beginning of a web of a replacement roll including an outer web layer and having an axis, the apparatus comprising:
- at least one suction ledge;
- means for moving the suction ledge into contact with the outer web layer in a position in which the suction ledge extends parallel to the axis of the roll, the suction ledge having a first side and an oppositely directed second side;
- a web cutting device mounted adjacent the second side of the suction ledge;
- and a base member, the suction ledge and the web cutting device being mounted on the base member, the base member having support arms directed toward the roll and arranged outside the suction ledge and the web cutting device, the support arms being dimensioned such that they contact the outer layer when the suction ledge contacts the outer layer, the web cutting device being dimensioned such that it is spaced from the outer layer when the support arms contact the outer layer, the first side of the suction ledge being in close proximity to one of the support arms of the base member.
Dependencies are inferred from the claim text.