Image printer stylus bar, manufacturing method therefor and image printer device

A stylus bar for two-state printing on electrosensitive paper scanned in successive lines by said bar which comprises as many mutually insulated styli forming a stylus area on said bar as there are image points in each scanning line and a shift register type memory receiving data defining said image points, with a shift control input and supply inputs and with parallel outputs individually controlling said styli and thereby the marking of said image points on said paper, the stylus bar being characterized in that said memory comprises 2.m register stage chips each with a serial data input, n parallel outputs, a serial data output and control inputs comprising a clock input controlling the shifting of data from one register stage to the next and two feed inputs defining two voltage levels corresponding to the levels of said data, m and n being integers such that the product 2.m.n. is at least equal to the number of styli, said chips being supported on at least one film and connected in series in two groups of m chips with their control inputs of the same type placed in parallel, with its m chips arranged basically in a same plane and each with an input series of data and constituting two separate shift registers each with m.n parallel outputs, at least some of which consecutive parallel outputs of said m chips in series and forming useful parallel outputs of the m chips of the register in question being connected to respective styli of like rank in said stylus area, so that respective regsiters are connected to odd ranked styli and to even ranked styli in the stylus area, so as to simultaneously feed said styli with one of said voltage levels, according to the binary data level present on respective useful parallel outputs of said chips, representing individual control signals for the styli to which they are connected.