A knife (100; 100′)) is arranged to be fitted to a cutting apparatus to obtain incision lines and cuts on a capsule (7) made of plastics intended to close a container and it is suitable for performing cuts and incisions on a side wall (70) of the capsule (7) when the capsule (7) by rotating around a rotation axis (R) thereof is moved along a path to interact with the knife (100; 100′) in an advancement direction (T); the knife (100; 100′) comprises a plurality of cutting tools arranged in a layered structure, wherein the cutting tools are parallel to a plane (P) and stacked in the direction of a vertical axis (Z) orthogonal to the plane (P), the layered structure comprising: —a first horizontal cutting tool (10) arranged for performing circumferential cuts on the side wall (70) at a first height on the vertical axis (Z) to define an tamper ring (72) in the capsule (7); —a second horizontal cutting tool (20), arranged for performing further circumferential cuts on the side wall (70) at a second height different from the first height on the vertical axis (Z); and —a third cutting tool (30; 30′), arranged for performing oblique cuts on the side wall (70) and to determine in use together with said second horizontal cutting tool (20) and with said first horizontal cutting tool (10) connecting portions (74a, 74b) connecting the tamper ring (72) and the side wall (70); wherein the third cutting tool (30; 30′) comprises at least two tilted cutting edges (32a, 34; 32a′, 34′) having a tilt different from each other, the tilt referring to a reference plane passing through the vertical axis (Z) and tangent to the advancement direction (T) of the capsule (7), the third cutting tool (30, 30′) being interposed between the first horizontal cutting tool (10) and the second horizontal cutting tool (20), the third cutting tool (30; 30′) being interposed between the first horizontal cutting tool (10) and the second horizontal cutting tool (20), wherein the third cutting tool (30; 30′) is arranged to be disassembled from said layered structure in order to be replaced with a different third cutting tool to obtain a different shape of the connecting portions (74a, 74b).

A knife (100; 100′)) is arranged to be fitted to a cutting apparatus to obtain incision lines and cuts on a capsule (7) made of plastics intended to close a container and it is suitable for performing cuts and incisions on a side wall (70) of the capsule (7) when the capsule (7) by rotating around a rotation axis (R) thereof is moved along a path to interact with the knife (100; 100′) in an advancement direction (T); the knife (100; 100′) comprises a plurality of cutting tools arranged in a layered structure, wherein the cutting tools are parallel to a plane (P) and stacked in the direction of a vertical axis (Z) orthogonal to the plane (P), the layered structure comprising: —a first horizontal cutting tool (10) arranged for performing circumferential cuts on the side wall (70) at a first height on the vertical axis (Z) to define an tamper ring (72) in the capsule (7); —a second horizontal cutting tool (20), arranged for performing further circumferential cuts on the side wall (70) at a second height different from the first height on the vertical axis (Z); and —a third cutting tool (30; 30′), arranged for performing oblique cuts on the side wall (70) and to determine in use together with said second horizontal cutting tool (20) and with said first horizontal cutting tool (10) connecting portions (74a, 74b) connecting the tamper ring (72) and the side wall (70); wherein the third cutting tool (30; 30′) comprises at least two tilted cutting edges (32a, 34; 32a′, 34′) having a tilt different from each other, the tilt referring to a reference plane passing through the vertical axis (Z) and tangent to the advancement direction (T) of the capsule (7), the third cutting tool (30, 30′) being interposed between the first horizontal cutting tool (10) and the second horizontal cutting tool (20), the third cutting tool (30; 30′) being interposed between the first horizontal cutting tool (10) and the second horizontal cutting tool (20), wherein the third cutting tool (30; 30′) is arranged to be disassembled from said layered structure in order to be replaced with a different third cutting tool to obtain a different shape of the connecting portions (74a, 74b).

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. The driving means may be associated with one of the support or the base to reciprocally shift the one of the support or the base with respect to the other of the base or the support for a distance (D) in a shifting direction.

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.

A perforating apparatus has a base having at least one counter component. The counter component has a length, L.sub.CC, and a nonlinear repeat length. 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.

A non-venting one-piece, partially perforated multilayer induction heat seal liner for a container that allows an aroma or scent from a solid substance within the sealed container to permeate through the liner, while preventing leakage and/or physical contact of the substance by the consumer. The liner includes a partial perforation extending completely through a metal foil layer, and leaving an un-perforated thickness in a paper layer. The partial perforation will allow a prospective customer to sniff the scent or aroma released through the partial perforation, while the liner remains secured to the container, extending shelf life of the substance, and preventing leakage, as well as, contamination, damage and/or reduced volume caused by consumers sampling the substance/product within the container.

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.

A tool for manufacturing a cap for a container comprises a blade set that includes a plurality of knives. The knives are configured to make incisions in a cap having a main body having a top plate and a circular sidewall. The top plate has a top surface, wherein two opposite sides of the circular sidewall circularly connect to each other, one periphery of the circular sidewall connects to one surface of the top plate forming a closed end, and the other periphery of the circular sidewall at the opposite side of the closed end forms an opened end and a ring member, which is located at the opened end of the main body. There is a first tab on the ring member and a second tab on the sidewall.

A method of fabricating an acoustic device includes forming a plurality of holes in a panel, disposing the panel in a support frame, and heating the panel to a temperature such that the panel sags while disposed in the support frame and each hole of the plurality of holes is modified.

A high-moisture-permeability, microporous plastic film randomly having a lot of recesses having different opening diameters and depths, with clefts formed in the recesses, is produced by pressing a first pattern roll randomly having a lot of high-hardness, fine particles having sharp edges on a roll body surface to a flat-surface metal roll, to produce an anvil roll randomly having a lot of recesses on a metal roll surface; arranging a second pattern roll randomly having a lot of high-hardness, fine particles having sharp edges on a roll body surface oppositely to the anvil roll; and passing a plastic film through a gap between the second pattern roll and the anvil roll.