Device for turning sheet-like substrates
a technology of substrates and devices, applied in the direction of printing, instruments, transportation and packaging, etc., can solve the problems of high energy consumption for generating the required amount of air, high air consumption needed to generate a sufficient air cushion over the width impair the guidance accuracy of the substrate sheet, so as to achieve a lower air consumption for generating the air cushion
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first embodiment
[0044]FIG. 6 shows a schematic detailed view of a continuous channel structure 60 in a substrate guide surface 30 of a turning element 20 in accordance with a The channel structure 60 can be designed in the form shown both in the area 32 in accordance with FIG. 4 and in the areas 45 of FIG. 5.
[0045]The channel structure 60 has a plurality of parallel-extending circumferential channels 62 and a transverse channel 64 provided in the substrate guide surface 30. The circumferential channels 62 extend in the circumferential direction of the turning element 20. The respective circumferential channels 62 are connected to one another via the transverse channel 64, the latter centrally intersecting the circumferential channels 62 in the circumferential direction of the turning element. It would of course also be possible to provide several transverse channels intersecting the circumferential channels 62 in the circumferential direction of the turning element at different points.
[0046]The ci...
second embodiment
[0050]FIG. 8 shows a schematic detailed view of an alternative continuous channel structure 100 in a substrate guide surface 30 of a turning element 20 in accordance with a The channel structure 100 can be designed in the form shown both in the area 32 in accordance with FIG. 4 and in the areas 45 of FIG. 5.
[0051]FIG. 8 shows a statistical distribution of one or more channels of the channel structure 100, with the following relating to only one channel. The channel is continuous, i.e. designed such that every point inside the channel is connected via the channel to any other point in the channel.
[0052]The distribution of the channel forming the channel structure 100 inside the substrate guide surface corresponds to a statistical distribution. The distribution of the channel structure 100 substantially follows a uniform distribution, but can have any required distribution. The channel forming the channel structure 100 has a depth of preferably 0.1 to 1 mm.
[0053]Gas outlet openings 6...
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