US2045721A - Conveying attachment for paper cutters - Google Patents

Description

June 30, 1936. J. cl PENWELL CONVEYING ATTACHMENT FOR PAPER CUTTERS Filed April 29, 1955 2 Sheets-Sheet 1 INVENTOR', 6

W 4W BYVV'M 0M 44- ATTORNEY 30, 1936. J. c. PENWELL CONVEYING ATTACHMENT FOR PAPER CUTTERS Filed April 29, 1955 2 Sheets-Sheet 2 I INVENTOR 4 ATTORNEY Patented June 30, 1936 UNITED STATES PATENT OFFICE CONVEYING ATTACHMENT FOR PAPER CUTTERS Application April 29,

3 Claims.

This invention relates to new and useful improvements in conveying attachments for paper cutters.

It is one of the principal objects of my invention to provide for paper cutters, a conveying attachment that will increase production substantially fifty percent. As against a rate of to linear feet per minute at the present time, my improved conveying attachment will pull the paper from the roll at the rate of approximately 325 to 330 linear feet per minute.

On the original machine no provision is made for holding the paper on the conveying tapes, with the result that when the machine ran fast, the severed sheets of paper would become misplaced. My invention, therefore, contemplates the provision of hold-down tapes which move in contact with the original tapes to carry the paper sheets in a properly placed and alined manner, thereby making possible an increased speed and greater production of the machine.

Another object of my invention is to provide a flexible sheet that may be attached to the cutting cylinder for wiping contact with the paper to assist the feed rolls in presenting it to the cutting blades, and in properly placing it under the hold-down tapes. If no such means are provided, the paper will frequentlyfollow the cutting cylinder around to clog up the machine.

Other important and incidental objects will be brought out in the following specification and particularly set forth in the subjoined claims.

In the accompanying drawings illustrating my invention, Figure 1 is a side view of a paper outter showing my sheet aligning and conveying attachments therefor. Figure 2 is a top plan view thereof. Figure 3 is a longitudinal sectional view taken through the rotary cutter mechanism, showing the flexible sheet aliner attached to the cutting cylinder. And Figure 4 is a longitudinal sectional view taken through the front end of the sheet conveying attachment, showing the floating pulley structure for the sheet engaging tapes.

Referring to the accompanying drawings for a detailed description of my invention, the numerals I and 2 designate a pair of connected side frames having raised rear end portions 3, 3 that support cross shafts 4. In this instance there are three of these shafts 4 for supporting three rolls of paper 5.

Projecting upwardly from the raised portions of the side frames I and 2, in front of the paper rolls 5, are oppositely disposed brackets 6, 6 for supporting shafts 'I and 8 upon which co-acting 1935, Serial No. 18,942 (01. 164--68) feed rollers 9 and III are respectively mounted. These feed rollers receive between them the leading ends of the paper from the rolls 5, and present this paper to a cutting cylinder 1 I.

The cylinder II is mounted on a shaft I2 supported by the front ends of the raised portions 3 of the side frames I and 2. The cylinder II carries a cutting blade I3 that is adapted to pass a fixed blade I4 secured to the brackets 6, 6, to shear the paper from the rolls 5 when the shaft I2 carrying the cylinder is rotated. Securedto the outer end of the shaft I2 is a pulley I5 that is driven by a belt on the main drive pulley not shown.

At their front ends the side frames I and 2 have forwardly extending arms I6 to support a sheet receiving table II. Mounted in the forward ends of the side frames I and 2, immediately behind, and just above, the table I1, is a shaft I8 upon which a series of pulleys I9 are fixedly mounted. Projecting downwardly from the top portions of the side frames I and 2, a short distance behind the pulleys I9, .are brackets 20, 20 which carry a shaft 2| upon which a series of idler pulleys 22 are mounted. Supported between the rear ends of the side frames I and 2, behind and below the cutting cylinder II, is a shaft 22 upon which a series of pulleys 23 are mounted.

The pulleys I9, 22 and 23 are arranged to substantially the same vertical planes to receive endless conveying tapes 24. The upper runs of these tapes travel from pulleys 23 behind the cutter cylinder I I, over the top of the side frames I and 2, to the pulleys I9, to deliver the severed sheets from said cylinder to the table II.

In order to firmly hold the severed sheets of paper on the tapes 24 while they travel from the cutting cylinder to. the table I1, I have provided flexible hold-down means such as endless tapes 25. These tapes 25 are so mounted upon the following pulleys that their lower runs move forwardly with the upper runs of the tapes 24 to hold the severed paper sheets firmly upon the lower tapes, thus preventing a misplacement of I said sheets upon the latter tapes when the machine is run fast.

Projecting upwardly from the side frames I and 2, in substantial alinement with the bracket arms 20, 20, are bracket arms 26, 26. Supported by the latter bracket arms is a transverse shaft 21 upon which there is mounted a series of pulleys 28 over which the tapes 25 pass. At the rear of the machine these tapes pass over a drum 29 mounted on a shaft 30 supported by vertical brackets 3| secured to the side frames l and 2 immediately in front of the cylinder H. The drum 29 is disposed at a height which permits the lower runs of the tapes 25 to bear upon the severed sheets with sufficient force to hold them tight upon the lower tapes 24 during their forward travel between said tapes.

Immediately above the pulleys l9, floating pulleys 32 are mounted on stub shafts 33 carried by the forward ends of arms 34 which are pivotally attached at their rear ends to the shaft 21. (See Figures 1, 2 and 4.) Over these pulleys 32 and the pulleys 28 short endless drive belts 35 pass.

Over the drive belts 35, and in contact therewith, the tapes 25 travel at the front end of the,

machine in order that they may be driven by the shaft 21. This shaft is in turn rotated by a belt 36 which passes over a pulley 31 fast on that shaft and a pulley 38 secured to the drive shaft l2.

The tapes 24 are driven in unison with the tapes 25' by the shaft 18, which is rotated by a crossed belt 39 that passes around a pulley 40 fast on said shaft and a pulley 4| secured to the shaft 21. While I have shown these means for driving the endless tapes 24 and 25 so that their paper gripping runs will move together at the same rate of speed, any other suitable means may be employed for this purpose without departing from the spirit of the invention.

For the purpose of holding the tapes 25 firmly against the paper sheets traveling forwardly on the tapes 24 between the pulleys 28 and 32, I secure to a cross member 42 supported by the bracket arms 26, 26 above the pulleys 28, holddown members 43. These springs engage the arms 34 which carry the pulleys 32, to press the tapes 25 which pass around them, firmly against the severed paper sheets on the conveying tapes 24. V

For the purpose of assisting the feed rolls 9 and ID in feeding the leading end of the paper between the cutting blades l3 and I4, and in properly placing the severed sheets between the tapes 24 and 25, I provide the following means. Secured between bracket arms 45 carried by the blade supporting projection 46 on the cylinder II, is a rod 41 over which a flexible sheet 48, in this instance paper, is looped. This flexible sheet 48 has a trailing end that nearly reaches the blade I3 on the other side of the cylinder.

When the cylinder II is rotated, the sheet 48 will follow the blade l3, to engage the paper being fed between that blade and the fixed blade l4, to assist the feed rolls 9 and E6 in drawing the leading end of the paper forward for the cutting operation. The wiping engagement of this flexible sheet 48 with the paper also prevents it from being drawn around the cylinder H by electric attraction to clog up and slow down the machine. It further aids in properly placing this paper between the tapes 24 and 25 which convey it in an orderly manner to the table l1 without danger of misplacement. The speed of the machine can thus be increased to insure faster and more economical production.

Having described my invention, I claim:

1. In a device of the type described, a roll of paper, a rotary cutter, feed rolls between the paper roll and the rotary cutter to feed paper to the latter, a cutting blade carried by said cutter, and a flexible sheet secured to said cutter behind the blade for wiping contact with the paper when the cutter is rotated, to assist the feed rolls in drawing the paper to the cutter from the paper roll.

2. In a device of the type described, a roll of paper, a rotary cylinder, feed rolls between the paper roll and the cylinder to feed paper to the latter, a cutting blade carried by said cylinder, and a bowed fibrous sheet secured at one end to said cylinder behind the cutting blade for wiping contact with the paper when the cylinder is rotated, to assist the feed rolls in drawing the paper to the cutter from the paper roll.

I 3. In a device of the type described, a roll of paper, a fixed cutting blade in front of said roll of paper, a rotary cylinder in front of said fixed blade, at cutting blade carried by said cylinder for co-action with the fixed blade to sever sheets from said paper roll, a conveyor in front of said cylinder, and a bowed flexible sheet secured at one end to said cylinder behind the blade carried thereby, for wiping contact with the paper, when the cylinder is rotated, to prevent it from adhering to'the cylinder and to assist in placing the severed sheets in an orderly manner upon the conveyor.

JESSIE CLARENCE PENWELL.

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