Preform coating device

A preform coating device, comprising:

• a plurality of rotary retention parts each of which horizontally retains a preform and rotates the preform about an axis of the preform,
• a conveyance part that conveys the preforms by moving the plurality of rotary retention parts, the plurality of rotary retention parts being arranged at predetermined intervals along a conveyance path of the conveyance part,
• a first dispenser that discharges coating solution toward the preforms, and
• a second dispenser having the same structure as the first dispenser,
• wherein the first dispenser and the second dispenser each comprises:
• a head having a structure for feeding the coating solution, and
• a plurality of nozzles in fluid communication with the head, each of the plurality of nozzles having a slot for discharging the coating solution,
• wherein the first dispenser and the second dispenser are arranged alternatingly on a same axis line along the conveyance path;
• wherein the first dispenser and the second dispenser have overlapping regions in a direction along the conveyance path;
• wherein one of the first and second dispensers is arranged below the preforms to be coated so as to discharge the coating solution upwardly;
• wherein the other of the first and second dispensers is arranged above the preforms to be coated so as to discharge the coating solution downwardly;
• wherein the plurality of nozzles are arranged at predetermined intervals along the conveyance path;
• wherein the intervals between the plurality of nozzles are equal to the intervals between the plurality of rotary retention parts;
• and
• wherein the plurality of nozzles of the first dispenser and the plurality of nozzles of the second dispenser are arranged alternatingly in the direction along the conveyance path.