as to be a sliding fit within aperture 70 of sleeve 68 the leg 76 can thus be releasably clamped by bolt 72 at a preadjusted height within sleeve 68 so as to adjust the height of pallet board 78 which bears work to be printed on its upper surface pallet board 78 bears indicia marks 80 82 so assist in correct positioning of work thereon a diagonal strengthening strut 84 is provided extending between sleeve 68 and horizontal web 66 of the work holding means fig3 and 4 illustrate the apparatus described above in operation the work piece 86 to be printed e g a t shirt or sweater is mounted on pallet board 78 in the correct position then the pallet board 78 bearing the workpiece 86 is mounted on upper web 74 of the angle bracket the depending leg 76 of the angle bracket is then inserted into aperture 70 of bracket 66 68 and fixed therein at the correct height by tightening bolt 72 pallet board 78 now comprises a work table for the workpiece 86 with the arms 32 34 in the raised position as shown in ghosted outline in fig3 the printing screen 62 with the artwork thereon is now mounted on the arms for this purpose bolts 40 42 are loosened so as to adjust arms 32 34 lengthwise along the top cross member 20 to the correct separation to receive the periphery 64 of screen 62 in channel.