Method and apparatus for stacking serially advancing parallel streams of blanks
AssigneeThe Ward Machinery Company
InventorLouis M. Sardella
Life of this patent
Estimating the term…
Abstract
A method and an apparatus for stacking serially advancing parallel streams of blanks, such as corrugated paperboard blanks, by serially advancing such parallel streams in which there are spaces between pairs of such blanks in each of the streams but no spaces between the blanks of the pairs, creating spaces between the blanks of each pair during advance, stopping the advance of the blanks one after the other, and guiding succeeding spaced blanks one on top of the other to form a stack of blanks from each stream.
Claims11
Apparatus for stacking a stream of serially advancing blanks comprising:
- timed conveyor means for serially advancing and releasing said blanks from beneath said conveyor means, said timed conveyor means having first and second operable positions and, when in said first operable position, having means to advance serially spaced ones of said blanks at a constant velocity and, when in said second operable position, having a first means for advancing a second blank of pairs of blanks in said stream at a constant velocity and a second means for advancing a first blank in said pairs at a velocity initially equal to and then faster than said constant velocity to create a longitudinal space between otherwise adjoining said first and second blanks;
- stop means adjacent a discharge end of said timed conveyor means for stopping the advance of said blanks upon their release by said timed conveyor means;
- and
- receiving means beneath said timed conveyor means upon which said blanks are stacked following release by said conveyor means.
Apparatus for stacking blanks comprising:
- timed conveyor means for serially advancing and releasing said blanks from beneath said conveyor means, said timed conveyor means being selectively operable to:
- (a) advance serially spaced ones of said blanks;
- and to
- (b) create a space between non-serially spaced ones of said blanks while advancing said blanks to permit stacking thereof;
- stop means adjacent a discharge end of said timed conveyor means for stopping the advance of said blanks upon their release by said timed conveyor means;
- and
- receiving means beneath said timed conveyor means upon which said blanks are stacked following release by said conveyor means;
- said timed conveyor means including at least a first pair of laterally adjacent conveyor belt means of which a first conveyor belt of said first pair is rotatable at a substantially constant velocity for advancing a second of a pair of serially advancing blanks at said constant velocity and a second conveyor belt of said first pair is rotatable at a velocity initially equal to and then faster than said constant velocity of said first conveyor belt for advancing a first of said pair of blanks faster than said second blank for creating a space therebetween to advance non-serially spaced ones of said blanks.
A method of stacking a stream of serially advancing blanks comprising the steps of:
- (a) serially advancing a first stream of pairs of blanks in which there are longitudinal spaces between said pairs and no longitudinal spaces between the blanks in said pairs;
- (b) advancing the second blank of said pairs of blanks at a constant velocity and advancing the first blank in said pairs at a velocity initially equal to and then faster than said constant velocity thereby creating longitudinal spaces between said first and second blanks;
- (c) stopping the advance of said blanks one after the other following the creation of said longitudinal spaces;
- and
- (d) guiding said blanks one on top of the other to form a first stack thereof.
Dependencies are inferred from the claim text.