The invention is suitable for manufacturing thin-film components in a roll-to-roll process.

Droplets of polymerizable material may be patterned on a film sheet using a roll-to-roll system.

Examples are described including membrane fabrication systems using roll-to-roll processing to fabricate a forward osmosis membrane.

The photocurable resin can be applied by inkjet printing or can be applied by roll to roll imprinting or stamping with a mold.

Gas purging systems may provide for purging in parallel as fluid front of polymerizable material moves through roll-to- roll system.

An extended nip (N) is formed between a counter roll (50) and a shoe roll (10), which shoe roll (10) comprises a stationary support structure (12) and a flexible shell (30) rotating around it.

The shoe roll (10) has an opposite counter-roll (3), with a roll nip (4) between the shoe roll and the counter-roll.

At least one backing roll (161) is without a take-out roll.

Its regulator roller (66) links the water take-up roller (4A) with the transfer roller (63) pressing against the dampening distributor roller (8A).

The roller table roll comprises a roll shaft (4) and a roll casing (1) that is mounted on the roll shaft (4) at least at the roll ends (2; 3).

The drive roller (26) is adapted to abut the roll (3).

The shoe roll (10) has an opposite counter-roll (3), with a roll nip (4) between the shoe roll and the counter-roll.

The counter roller holds the paper between the conveyor belt and the counter roller and conveys the paper.

A second roller (130) abuts the first roller and rotates in response to rotation to he first roller.

The roll (3) of web is arranged to be biased against the drive roller (26).