In one example, a media support includes a continuous loop belt and multiple suction cups arranged along the outer perimeter of the belt. Each suction cup has a port aligned with a hole in the belt so that air may be evacuated from the suction cup when connected to a vacuum source.

Examples described herein include devices and methods for adjusting a suction force for a media holddown, comprising detecting an advancement of a media (114) relative to a media holddown surface along a media advancement direction (X), wherein the holddown surface has a plurality of suction zones arranged along the media advancement direction, and adjusting a suction force in the respective suction zones in accordance with the advancement of the media relative to the media holddown surface.

A printing system includes a driving belt configured to drive media through the printing system relative to one or more print heads and a vacuum conveyor system. The vacuum conveyor system includes a vacuum chamber cover having a first surface and a second surface opposite the first surface, as well as a plurality of slots through the cover that form openings from the first surface to the second surface. A seal, disposed within and extending along at least a portion of a length of a respective slot, is drivable to open or close the respective slot. A vacuum chamber below the second surface of the vacuum chamber cover is configured to apply a vacuum to the media through the plurality of slots. The applied vacuum constrains the media on the driving belt by flattening it against the driving belt.

The invention relates to a vacuum system for securing items in printing machines, comprising a printing table (2) with a perforated surface and, in relation thereto, a vacuum system for securing the items to be printed, which comprises a box structure (8) connected to a suction system and provided with a perforated wall in relation to the surface of the printing table (2), said box structure (8) having lateral panels that vertically close the interior thereof, which panels can be moved in order to adjust the gap between them in relation to the width of the items to be printed.

Provided is a battery cell material recycling apparatus. The battery cell material recycling apparatus includes a first vacuum belt conveying mechanism and a second vacuum belt conveying mechanism. The first vacuum belt conveying mechanism has a first feed end and a first discharge end opposite to each other in a conveying direction of the first vacuum belt conveying mechanism. The second vacuum belt conveying mechanism has a second feed end and a second discharge end opposite to each other in a conveying direction of the second vacuum belt conveying mechanism. The second feed end is located above the first discharge end. A guide roller is disposed below the second discharge end. The guide roller is movable back and forth in the conveying direction of the second vacuum belt conveying mechanism.

A sheet manufacturing apparatus 1 includes an accumulation section 50 that forms a web W; a transport belt 621 that comes into contact with one surface of the web W to hold the web W and transports the web W; a suction section 200 that is provided above the transport belt 621 to cause the web W to be adsorbed to the transport belt 621; and a sheet forming section 70 that forms the sheet with the web W, in which the suction section 200 has a first duct 210, a second duct 220 provided downstream of the first duct 210 in the transport direction, and a third duct 230 provided downstream of the second duct 220 in the transport direction, and a plurality of third suction holes 239a and 239b are provided in a suction region 233 of the third duct 230, the suction region 233 includes a first region 233a and a second region 233b located downstream of the first region 233a in the transport direction, and the number of the third suction holes 239b provided in the second region 233b is smaller than the number of the third suction holes 239a provided in the first region 233a.