Patent ID: 6502366
Filing Date: 2003-01-07
Classification: B29C,B65B

Abstract:
A packing material feeding apparatus for a vertical-type bag form-fill-sealing machine, said machine, when in a normal operation, feeding continuously a tubular packing material along a filling tube at a constant velocity and continuously forming a center seal on the packing material, while repeatedly filling articles into the packing material, forming a top seal on the packing material, and cutting the packing material to produce one bag every unit packing period, said apparatus comprising:a feeding device for feeding the packing material; and a controller for controlling a packing material feeding velocity through said feeding device, said controller including a deceleration state for decelerating the packing material feeding velocity from the constant velocity when the articles are not filled in a unit packing period; and an acceleration state for increasing the packing material feeding velocity to said constant velocity when filling of the articles is resumed after starting said deceleration state, wherein said acceleration state is executed using a period equal to or longer than said unit packing period.