Moving floor media transport for digital printers
View Patent ↗A step-wise medium transport system is provided having high accuracy for transporting recording media in a digital printer, the medium is transported using accurately moving tables to which the medium is attached during printing steps the working area of the medium, on which the printing is done by the printer, is at all times fully supported by a static table avoiding disturbances.
1. A receiving medium transport system arranged to transport a receiving medium in a printing system, the receiving medium including a working area on which a swath of an image is printed during a movement of at least one printhead across a widthwise direction of the receiving medium, the receiving medium transport system comprising:
a static table arranged to support the receiving medium and to apply a first holding force on the receiving medium to temporarily hold the receiving medium on the static table as the at least one printhead moves across the working area of the receiving medium; and
at least a first dynamic table arranged to apply a second holding force on the receiving medium to temporarily hold and to transport the receiving medium in a lengthwise direction of the receiving medium in the printing system; wherein
each of the static table and the first dynamic table are arranged to extend entirely across a widthwise direction of the receiving medium.
2. The receiving medium transport system according to claim 1 , wherein the static table includes a vacuum chamber arranged to hold the working area of the receiving medium stationary when the swath of the image is printed; and
the first dynamic table includes a vacuum chamber arranged to hold and transport the receiving medium when the receiving medium is transported.
3. The receiving medium transport system of claim 1 , further comprising a second dynamic table, wherein the static table is located in between the first dynamic table and the second dynamic table.
4. The receiving medium transport system according to claim 1 , wherein the first dynamic table and the static table include toothed shaped edges arranged such that the tooth shaped edges of the first dynamic table fit into the tooth shaped edges of the static table.
5. The receiving medium transport system according to claim 1 , wherein at least one of the first dynamic table and the static table includes a bevelled upstream edge.
6. The receiving medium transport system according to claim 1 , wherein at least one of the first dynamic table and the static table includes a plurality of separate vacuum chambers.
7. The receiving medium transport system according to claim 6 , wherein each of the plurality of separate vacuum chambers includes at least one blind valve arranged to switch on and off a vacuum therein by opening and closing the at least one blind valve.
8. The receiving medium transport system according to claim 1 , further comprising a second dynamic table and first and second guide rails including at least one spindle drive mechanism, the first and second guide rails arranged to support and guide the first and second dynamic tables as the first and second dynamic tables are moved simultaneously along the first and second guide rails by the at least one spindle drive mechanism.
9. The receiving medium transport system according to claim 8 , wherein the first guide rail is rigidly mounted to the receiving medium transport system and the second guide rail is suspended from the receiving medium transport system so as to enable expansion of the first and second dynamic tables.
10. The receiving medium transport system according to claim 8 , wherein the first and second guide rails are common to the first and second dynamic tables.
11. An ink jet printing system comprising:
the receiving medium transport system according to claim 1 ; wherein
the at least one printhead is an ink jet printhead.
12. A receiving medium transport system arranged to transport a receiving medium in a printing system, the receiving medium including a working area on which a swath of an image is printed during a movement of at least one printhead across the receiving medium, the receiving medium transport system comprising:
a static table arranged to support the receiving medium and to apply a first holding force on the receiving medium to temporarily hold the receiving medium on the static table as the at least one printhead moves across the working area of the receiving medium; and
at least one dynamic table arranged to apply a second holding force on the receiving medium to temporarily hold and to transport the receiving medium in the printing system; wherein
the static table is arranged to support the entire working area of the receiving medium as the at least one printhead moves across the working area of the receiving medium, and the at least one dynamic table is arranged to not support any portion of the working area of the receiving medium as the at least one printhead moves across the working area of the receiving medium.