tensioned as drum 12 moves web 14 past the coater head 16 a layer of coating material 18 is deposited onto web 14 although not shown it will be understood that coater head 16 is moved into the position shown in fig1 in relation to web 14 by any known apparatus or device used for this purpose coating material 18 is supplied under pressure from a source not shown to a chamber 20 formed within the short dwell coater 10 fluid communication is established between chamber 20 and coater head 19 by passage 22 since coater head 16 is constructed to extend across the width of web 14 it is necessary to ensure that the flow of coating material is uniformly distributed across the coater head length to this end passage 22 is formed to establish fluid communication across the length of coater head 16 as can be seen more clearly in fig2 and 3 coater head 16 forms a pool or reservoir 24 of coating material immediately adjacent and in contact with web 14 reservoir 24 is formed in coater head 16 by coater blade 26 baffle 28 end dams 30 and 32 and bottom wall 34 as shown in fig2 blade 26 forms the trailing wall of head 16 with respect to the movement of web 14 and includes a top edge 36 which is oriented substantially parallel to web 14 blade 26 is held in place by the pinching action which occurs between the forward end of bottom wall 34 and the rearward end of projection 37 such pinching action is the result of pivoting the front portion of the coater containing chamber 20 and projection 37 about pivot pin 38 in a counterclockwise direction the reverse movement can also produce this pinching action namely.