Tactile feature tool

摘要

An embossing head for use in a rotary printing press has a raised embossing stamp, a constraining means for constraining motion of the embossing stamp along a radial direction, and adjustable positioning means for stopping radially downward motion of the embossing stamp at an adjustable lowermost position for determining an adjustable radial height of the raised embossing stamp. A number of embossing heads may be mounted independently to annular collars of the press to enable free positioning of the corresponding embossments in both dimensions of the sheet material. The adjustable positioning means enables fine height selection and adjustment of each embossing stamp individually so as to enable and facilitate the production of embossments on sheet material within specified tolerances reliably over numerous print cycles.

主权项

1. An embossing head for use in a rotary printing press to produce embossments on a sheet material wherein the rotary printing press comprises an upper rotary cylinder having a longitudinal rotational axis and an opposing lower rotary cylinder for sandwiching the sheet material fed between the upper and lower rotary cylinders, the embossing head comprising:
at least one embossing plate assembly, each embossing plate assembly comprising at least one raised embossing feature extending vertically upwardly from an upper surface of the embossing plate assembly for forming at least one embossment on the sheet material; a mounting block for reversibly coupling with each embossing plate assembly to substantially constrain motion of the embossing plate assembly to a vertical direction, wherein the mounting block comprises a mounting apparatus configured for rigidly and reversibly mounting the mounting block to the upper rotary cylinder of the rotary printing press; and for each embossing plate assembly, an adjustable positioning means comprising a restoring member coupled to the mounting block and the embossing plate assembly for continuously urging the embossing plate assembly vertically downwardly and for maintaining coupling of the embossing plate assembly with the mounting block, and an adjustable stopping member coupled to the mounting block and contacting the embossing plate assembly for stopping the vertical downward motion of the embossing plate assembly at a selectable lowermost vertical position, wherein the adjustable stopping member is adjustable to raise or lower the lowermost vertical position to thereby select a corresponding vertical position of an upper surface of the embossing feature relative to the mounting block.