Sheet feeding in box making machines

摘要

Plastic sheets are fed along a horizontal path from the bottom of a stack to a box making machine by a conveyor. The rear end of the stack rests on a metering bar located above the path at the rear end of the stack so that when the lowermost sheet is fed by the conveyor, its rear end drops and air jets from an air knife are introduced in the space between the stack and the lowermost sheet at the rear end of the stack to overcome friction forces and separate the lower most sheet from the stack as the sheet is conveyed along the path.

主权项

1. Sheet feeding apparatus for feeding sheets along a path from the bottom of a stack of sheets comprising in combination, a conveyor means for moving sheets from the bottom of a stack of sheets, a support means under the stack and above said path for engaging the lowermost sheet, said conveyor means being engageable with the lowermost sheet to move it off said support means and along said path, and air flow means for directing a flow of air between the lowermost sheet and the stack to separate the lowermost sheet from the stack, said support means being located to engage a rear end portion of said stack, and said air flow means being located to direct a flow of air at the rear end of the stack of sheets in a space located between the lowermost sheet and its overlying sheet once said conveyor moves the lowermost sheet off said support means.