Rotary Plate - the curved plate used on a rotary press.
*Rotary Press - a press that prints from curved plates fastened around a cylinder. First used in 1914 to print an imperforate coil stamp (Scott 459).
Rotary Plate: A curved or cylindrical printing plate used on a press that rotates the plate to make continuous impressions. Flat plates make single impressions.
on rotary plates from Scott 1789 onward. 11: "A" inscription, U.S. non-denominated stamp, valued 15-cents, placed on sale May 22, 1978. 12: (Ger.) Auslandsbriefpriifstelle; Foreign Letter Censor Office, WW II, followed by letter indicating city.
Flat Plate. A form of printing where the plate is flat, in contrast to rotary plate which is curved.
Frank. A marking indicating the right of free postage.
Frame. The border, or outside, portion of a design.
Straightedge -- An increasingly endangered stamp species, as more and more older stamps are hunted down and perforated. U.S. stamps printed by flat plate or rotary plate have straightedges on the stamps from the exterior rows and columns of the ...
Rotary press - a printing press that utilizes curved plates that rotate rapidly, printing on a continuous roll of paper. Stamps printed on a rotary press are usually longer or wider than the same stamps printed from flat plates because rotary plates ...
Stamps produced on a flatbed press have a line from the guideline between the panes. Stamps produced on a rotary press have a joint line from the space where ink collects between the sections of curved rotary plates.
 See also: Printing, Stamp, Plate, Used, Official
  
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