Abstract: The invention relates to an apparatus and a method for making window cutouts (22) in a frame material (20) in web form for a membrane electrode unit, wherein, at least in some section or sections, the frame material (20) is processed as a material combination with a carrier web (30), wherein a contour cut (50) that cuts through the frame material (20) is made in the frame material (20) from an opposite side of the frame material (20) to the carrier web (30), while forming a punching chad (201), wherein the contour cut (50) is made without cutting through the carrier web (30), wherein the punching chad (201) is separated from the material combination using a rotatable roller (40, 40a) having a suction opening (402), wherein a suction force is applied to the punching chad (201) via the suction opening (402), with the result that the punching chad (201) is detached from the carrier web (30) by use of the suction force and transported away from the material combination using the roller (40, 40a).

Abstract: The invention relates to a turning device for turning flat workpieces comprising a first holding plate (41), a second holding plate (42) and an intermediate joint (43) arranged between the first holding plate (41) and the second holding plate (42), wherein the intermediate joint (43) is mounted so as to be displaceable perpendicularly to a running plane (40), wherein the first holding plate (41) and the second holding plate (42) are mounted in the running plane (40) via joints so as to be pivotable, wherein the first joint (412) and the second joint (422) are mounted so as to be displaceable along the running plane (40), wherein a drive device (44) is provided, by which the intermediate joint (43) can be driven to a displacement relative to the running plane (40), and wherein the intermediate joint (43), the first joint (412), the second joint (422), the first holding plate (41) and the second holding plate (42) form a folding mechanism, so that a displacement of the intermediate joint (43) away from the runn

Abstract: The invention relates to a punching apparatus in the form of a punching cylinder (1) for the rotary cutting of a material web (4), or in the form of a punching sheet (10) for mounting on a cylinder (1) for the rotary cutting of a material web (4), wherein a cutting contour (12) is provided on a circumference of the punching cylinder (1), or on a surface of the punching sheet (10), and a track (3) with a multiplicity of circumferentially spaced-apart cutting teeth (30) is provided at least in the circumferential portion of the cutting contour (12) on the circumference of the punching cylinder (1), or a track (3) which runs in the longitudinal direction (II) and has a multiplicity of longitudinally spaced-apart cutting teeth (30) is provided at least in the portion of the cutting contour (12) on the surface of the punching sheet (10).

Abstract: The invention relates to a method and an apparatus for positionally accurate processing of a material web in a web-processing process for the series production of products, in particular for producing membrane assemblies, wherein a shaped element (2) is introduced into the material web (1) or a shaped element (2) is applied to the material web (1), wherein multiple reference marks (3) per product are created when the shaped element (2) is being introduced into or when the shaped element (2) is being applied to the material web, and, in a subsequent process step for positionally accurate processing of the material web (1) relative to the shaped element (2) of a product, the position of at least one of the multiple reference marks (3) of this product and/or at least one of the multiple reference marks (3) of a following and/or a preceding product is detected.

Abstract: The invention relates to a method and an apparatus for producing a membrane assembly in a web-processing process, comprising providing a first frame material (11) and a second frame material (12) as material from a roll, and forming the membrane assembly in a web-processing process, wherein membrane blanks (13) are laminated with the first frame material (11) and the second frame material is laminated with the composite comprising the first frame material (11) and the membrane blanks (13), and wherein the membrane assembly is formed on a rotating central roller (2).

Abstract: The invention relates to a device and to a method for transferring a functional layer, in particular a catalyst-coated membrane (2) and/or a gas diffusion layer for a membrane electrode assembly, onto a first material web, wherein: precuts (20) of a functional layer are transferred onto a moving counter surface with a first spacing (x1); the precuts (20) are supplied by means of a second material web (3) with a second spacing; the first spacing (x1) is greater than the second spacing (x2); the second material web (5), at least in a handover portion for carrying over a precut (20) moves synchronously with a conveying speed of the counter surface and is braked relative to the conveying speed to change the spacing; and the dispensing edge (6) in the first transport direction (1) relative to the second material web (5) is adjusted in order to create a braking and acceleration section for the precuts (20) moving discontinuously with the second material web (5).