Abstract: The invention describes a gutter for incorporation in the print head of a continuous inkjet printer. The gutter, which is preferably provided with a slot entrance, is configured to reflect ink droplets which pass into the gutter off the gutter walls and towards the exit passage of the gutter. This arrangement allows the gutter to perform extremely well even when there is significant mis-alignment of the drop generator with the gutter.

Abstract: The present invention provides a flow field plate (separator) for a fuel cell or electrolyser, comprising one or more branched primary fluid delivery/removal channels feeding narrower secondary fluid diffusion channels defined by an array of lands forming a network of interconnected fluid diffusion channels therebetween. The fluid delivery/removal channels and the fluid diffusion channels may be gas delivery/removal channels and gas diffusion channels respectively. The branched fluid delivery channels may simply feed the fluid diffusion channels, which themselves lead directly or via a fluid removal channel to a fluid outlet.