A perforating apparatus has a base having at least one counter component. The counter component has a length, L.sub.CC, and a nonlinear shape having a shape width, W. A support is operatively engaged with the base. A blade having a length, L.sub.B, is disposed on the support so as to cooperate in interacting relationship with the counter component. The blade has a plurality of teeth. A web material is perforated as it passes between the base and the support and the blade cooperates with the counter component. A driving means is associated with one of the support and the base to reciprocally shift the one of the support or the base for a distance, D, in a shifting direction. The distance, D, is at least the translational distance that one tooth travels to cover the shape width, W.

A method for providing a nonlinear line of weakness on a web material includes: providing a counter component comprising a nonlinear shape, where the nonlinear shape has a shape width, W; providing a blade in operative relationship with the counter component and comprising a plurality of teeth; rotating at least one of the blade and the counter component into interacting relationship with the other of the blade and the counter component; feeding a web between the counter component and the blade such that while in interacting relationship the blade cooperates with the counter component to perforate the web, wherein the web is moving in a machine direction; and reciprocally shifting one of the counter component and the blade for a distance, D, in a shifting direction, wherein D is at least the translational distance that one tooth travels to cover the shape width, W.

An apparatus (2) for flatting, punching or stamping a material (40) introduced into the apparatus (2), said apparatus (2) comprising a first cylinder (14) provided with an outer layer configured for flatting, punching or stamping the material (40); a back-pressure cylinder (16) extending parallel to the first cylinder (14) and an adjustment mechanism (22, 22, 28, 28, 34, 34, 36) for adjusting the distance between the first cylinder (14) and the back-pressure cylinder (16). The adjustment mechanism (22, 22, 28, 28, 34, 34, 36) comprises a first contact member (22) and preferably a second contact member (22) brought into contact with the bottom portion (circumference) of the first cylinder (14). The contact member(s) (22, 22) are mounted on a structure (34, 34) being movably mounted relative to the back-pressure cylinder (16).

A perforating apparatus has a base having at least one counter component. The counter component has a length, L.sub.CC, and a nonlinear shape having a shape width, W. A support is operatively engaged with the base. A blade having a length, L.sub.B, is disposed on the support so as to cooperate in interacting relationship with the counter component. The blade has a plurality of teeth. A web material is perforated as it passes between the base and the support and the blade cooperates with the counter component. A driving means is associated with one of the support and the base to reciprocally shift the one of the support or the base for a distance, D, in a shifting direction. The distance, D, is at least the translational distance that one tooth travels to cover the shape width, W.

A perforating apparatus has a base having at least one counter component. The counter component has a length, L.sub.CC, and a nonlinear shape having a shape width, W. A support is operatively engaged with the base. A blade having a length, L.sub.B, is disposed on the support so as to cooperate in interacting relationship with the counter component. The blade has a plurality of teeth. A web material is perforated as it passes between the base and the support and the blade cooperates with the counter component. A driving means is associated with one of the support and the base to reciprocally shift the one of the support or the base for a distance, D, in a shifting direction. The distance, D, is at least the translational distance that one tooth travels to cover the shape width, W.

A method for providing a nonlinear line of weakness on a web material including providing: a base, a support, a blade, and a driving means. The base may comprise at least one counter component having a length (L.sub.CC) where the counter component comprises a nonlinear shape having a shape width (W). The support may be operatively engaged with the base. The blade may have a length (L.sub.B) and may be disposed on the support so as to either contact or to come in close proximity with the counter component. At least one of the counter component and the blade may have a nonlinear shape and at least one of the counter component and the blade may comprise multiple segments.

A rotary cutting device comprising an anvil and roll having at least one knife affixed thereon, the roll being rotatably mounted to the machine by bearings disposed on opposing ends of the roll and supported by bearing mounts connected to the machine frame. A thermal isolating mounting arrangement orients the bearing mounts so that thermal growth occurs along an axis generally perpendicular to a plane in which the knife and anvil interface. A thermal isolator may also be disposed between the bearing mounts and the machine frame to further inhibit heat transfer into the frame and the resultant effect on knife position.

A roll cutting device for a web processing machine having a cutter roll with only one knife affixed thereto, the cutter roll being rotatably mounted to the machine and configured to perforate or cut the web once per revolution of the cutter roll, and a stress balancing member mounted to the cutter roll in diametric opposition to the knife, the knife and the stress balancing member being connected to the cutter roll by similar connection means so that mechanical stresses caused by connection of the knife and the stress balancing member are balanced and the cutter roll rotates without stress-induced eccentricity.

A tubular product manufacturing apparatus successively delivers an injection molded tubular shaped body in the delivery direction. The manufacturing apparatus detects a defect on the surface of the molded body passing through the detection position in the delivery direction. The manufacturing apparatus separates a tubular product from the molded body. When a portion having a predetermined length in the molded body passes the detection position without detecting a defect, the manufacturing apparatus separates a tubular product from the molded body, which contains the portion having the predetermined length. When a defect is detected before a portion having the predetermined length in the molded body BT passes through the detection position, the manufacturing apparatus separates the defective tubular product from the molded body. The length of the defective tubular product is shorter than a good product length which is the length of the tubular product including the portion of the predetermined length.

A method for providing a nonlinear line of weakness on a web material includes: providing a counter component comprising a nonlinear shape, where the nonlinear shape has a shape width, W; providing a blade in operative relationship with the counter component and comprising a plurality of teeth; rotating at least one of the blade and the counter component into interacting relationship with the other of the blade and the counter component; feeding a web between the counter component and the blade such that while in interacting relationship the blade cooperates with the counter component to perforate the web, wherein the web is moving in a machine direction; and reciprocally shifting one of the counter component and the blade for a distance, D, in a shifting direction, wherein D is at least the translational distance that one tooth travels to cover the shape width, W.