초록 ▼

Apparatus for stacking paperboard blanks including a timed conveyor utilizing vacuum pressure to hold the blanks by their leading edges beneath the conveyor and serially advance them against a backstop whereupon they are released by the vacuum to settle upon an elevator which lowers incrementally as

Apparatus for stacking paperboard blanks including a timed conveyor utilizing vacuum pressure to hold the blanks by their leading edges beneath the conveyor and serially advance them against a backstop whereupon they are released by the vacuum to settle upon an elevator which lowers incrementally as a stack of blanks is formed thereon. When the stack is completed, interrupter tines move over the stack and under the conveyor to store oncoming blanks while the stack is discharged from the elevator after which is rises. As the tines withdraw, the stored blanks settle on the elevator and subsequent blanks form another stack. A counter is used to energize operation of the tines to form stacks of a predetermined number of blanks on the elevator. An inclined conveyor utilizing vacuum belts is used to feed the blanks into engagement with the timed conveyor.

대표청구항 ▼

Apparatus for stacking blanks comprising in combination: timed conveyor means for serially advancing and releasing said blanks from beneath a lower run of said conveyor means, said timed conveyor means including a plurality of laterally spaced conveyor belt means having a circumference substantially

Apparatus for stacking blanks comprising in combination: timed conveyor means for serially advancing and releasing said blanks from beneath a lower run of said conveyor means, said timed conveyor means including a plurality of laterally spaced conveyor belt means having a circumference substantially equal to twice the maximum length of said blanks that can be processed by said apparatus and having at least two arrays of vacuum ports therein spaced substantially equidistant around said circumference and adapted for engagement with leading edges of said blanks for causing said blanks to adhere to said belt means during advancement thereof, said conveyor belt means further including a standoff portion extending substantially between said arrays of vacuum ports for preventing the portion of said blanks not adhering to said arrays from adhering to said conveyor belt means; backstop means adjacent a discharge end of said conveyor means for stopping the advance of said blanks upon their release by said conveyor means; and receiving means beneath said conveyor means upon which said blanks are stacked following release by said conveyor means.