Apparatus and method of making cartons
First Claim
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1. The method of making pre-printed cartons comprising the steps of:
- forming a continuous single-backed corrugated paper web, including forming uniformly spaced corrugations extending transversely of the direction of web travel and crushing single corrugations at uniformly spaced intervals along said web to form lines of weakening, printing a continuous web of paper material with printed reference marks, joining said corrugated paper web and said continuous web of material to form a continuous double-back printed paper web, conveying said printed paper web from a first station to a second station, supporting said web in a slack condition between said first and second station while said web varies between a maximum and a minimum length, passing said web from said second station relative to a sensing means sensing the position of said reference marks, delivering said web to a press reciprocating at a uniform rate in timed relationship to the spacing of said reference marks, and varying the speed of said web delivered to said first station in accordance with the length of said web between said first and second stations, adding adhesive to all corrugations of said single-backed corrugated paper web except said single corrugations prior to joining said continuous web and said single-backed corrugated web.
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Abstract
Apparatus making foldable box blanks of pre-printed corrugated material by continuously delivering pre-printed web material to a reciprocating press which is operated intermittently to cut and score the web material and utilizing an accumulator mechanism which receives the pre-printed web material continuously and delivers it intermittently.
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Citations
18 Claims
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1. The method of making pre-printed cartons comprising the steps of:
- forming a continuous single-backed corrugated paper web, including forming uniformly spaced corrugations extending transversely of the direction of web travel and crushing single corrugations at uniformly spaced intervals along said web to form lines of weakening, printing a continuous web of paper material with printed reference marks, joining said corrugated paper web and said continuous web of material to form a continuous double-back printed paper web, conveying said printed paper web from a first station to a second station, supporting said web in a slack condition between said first and second station while said web varies between a maximum and a minimum length, passing said web from said second station relative to a sensing means sensing the position of said reference marks, delivering said web to a press reciprocating at a uniform rate in timed relationship to the spacing of said reference marks, and varying the speed of said web delivered to said first station in accordance with the length of said web between said first and second stations, adding adhesive to all corrugations of said single-backed corrugated paper web except said single corrugations prior to joining said continuous web and said single-backed corrugated web.
- View Dependent Claims (2)
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3. Apparatus for forming web material into foldable box blanks comprising:
- supply means forming a preprinted web, a reciprocating press including dies engagable with said web to cut and score blanks for forming boxes, said press reciprocating continously at a substantially uniform rate, feed means continuously delivering said web intermittently to said press in timed relationship to the reciprocation of said press, an accumulator mechanism interposed between said supply means and said feed means to hold a length of web and intermittently deliver it to said feed means, power means for said supply means to vary the rate of deliver of said web from said supply means between a minimum and a maximum rate and a minimum rate to vary the length of web material in said accumulator mechanism between a maximum length and a minimum length, and control means responsive to a minimum length of said web in said accumulator mechanism to increase the speed of said power means and responsive to a maximum length of said web in said accumulator mechanism to decrease the speed of said power means, said control means being engageable with said web when the length of web in said accumulator mechanism is at a maximum and movable out of engagement with said web when said accumulator mechanism is at a minimum, said accumulator mechanism including resilient means supporting said web.
- View Dependent Claims (4, 5, 6)
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7. Apparatus for making printed corrugated boxes comprising:
- means for making a corrugated web of single-backed paper, means for printing a continuous web of material with uniformly spaced areas of printing, means bonding said single-backed web and printed web together to form a corrugated continuous printed web, a conveyor for transporting said corrugated continuous web continuously and at a speed varying between minimum and a maximum, a reciprocating press including dies engageable with said web to cut and score a blank for forming a box, said press being reciprocated continuously at a substantially uniform rate, supply means operable to deliver said web to said press, means for sensing said areas of printed material on said web for regulating the speed of said supply means in timed sequence with said press, accumulator means between said conveyor and said supply means for receiving and storing a variable length of said continuous printed web in a draped condition between said conveyor and said supply means, and means sensing the length of web in said accumulator means and operative to control the rate of delivery of said web from said conveyor to said accumulator means.
- View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. Apparatus for forming web material into foldable box blanks comprising:
- supply means forming a preprinted web, a reciprocating press including dies engageable with said web to cut and score blanks for forming boxes, said press reciprocating continuously at a substantially uniform rate, feed means continuously delivering said web intermittently to said press in timed relationship to the reciprocation of said press;
an accumulator mechanism interposed between said supply means and said feed means to hold a length of web and intermittently deliver it to said feed means, power means for said supply means to vary the rate of deliver of said web from said supply means between a maximum rate and a minimum rate to vary the length of web material in said accumulator mechanism between a maximum length and a minimum length, and control means responsive to a minimum length of said web in said accumulator mechanism to increase the speed of said power means and responsive to a maximum length of said web in said accumulator mechanism to decrease the speed of said power means, said control means including a control motor for selecting the rate at which the speed of said power means is changed.
- supply means forming a preprinted web, a reciprocating press including dies engageable with said web to cut and score blanks for forming boxes, said press reciprocating continuously at a substantially uniform rate, feed means continuously delivering said web intermittently to said press in timed relationship to the reciprocation of said press;
Specification