Patent ID: 6314771
Filing Date: 2001-11-13
Classification: D06B,F16K

Abstract:
A device for applying a patterning agent to a carpet web, comprising:an application bar extending crosswise and parallel to the carpet web;a slide surface disposed on a first face of the application bar, adapted for contacting the carpet web;a slit-like outlet zone formed in the application bar, opening into the slide surface, and extending along a working width of the application bar;support means disposed opposite to the slit-like outlet zone, adapted for biasing the carpet web towards the slit-like outlet zone;a plurality of feed lines supplying the patterning agent to the slit-like outlet zone; anda plurality of valves disposed in the application bar, corresponding to the plurality of feed lines, adjacent to the slit-like outlet zone;each one of the plurality of valves further comprising:a cylindrical valve chamber;a valve body rotatable on an axis of rotation substantially perpendicular to the carpet web;an outlet channel formed in the valve body along the axis of rotation, opening into the slit-like outlet zone;an inlet channel, fluidly connected to the outlet channel;a feed channel opening into the valve chamber, fluidly connected to the corresponding feed line; andat least one additional feed channel opening into the valve chamber, fluidly connected to a corresponding one of a plurality of additional feed lines supplying an additional patterning agent to the slit-like outlet zone;wherein the valve body is rotatable to bring the inlet channel in fluid connection with one of the feed channel and the at least one additional feed channel.