US2255123A - Manufacture of paperbacked lathing - Google Patents

Description

5 Sheets-Sheet 1 MANUFACTURE OF PAERBACKED LATHING R. T. MCGEE ET Al.

Filed oct. 23, 19:57

w-menllo'zam Sept. 9, 1941.

INVEN-r Rs M ZWZWM+ aCou/ML 2M @aw i: ATTORNEYS Sept. 9, 1941.

R. 1'. MCGEE ET AL MANUFACTURE OF PAPERBACKED LATHING Filed oct.l 25, .193? s sheets-sheen 2 INV NTORS @L s anni B W ATTORNEY4 Sept. 9, 1941. R. T. MCGEE Erm. i J 2,255,123 MANUFACTURE OF PAPERBACKED LATHING Filed Oct. 23, 1937 3 Sheets-Sheet 5 l VE TORJ Wvalnw ATTORNEYS Patented Sept. 9, 1941 Richard T. McGee and Leonard 4W. Cross,

Wheeling, W. Va., assignors to The Consolidated Expanded Metal Companies, Wheeling, W. Va., a corporation of West Virginia Application October 23, 1937, Serial No. 170,715 7 Claims. (Cl. 154-1)l This invention-relates to the manufacture of paper-backed lathing and is particularly concerned with a method and apparatus for applying paper backing to lathing sheets in a continuous manner, preferably employing a continuous roll of backing paper, and severing the paper between adjacent sheets of lathing to which it is applied.

general the equipment consists of a feed conveyor at the entrance end of the machine, adapted to receive sheets of lathing. such as expandedmetal paper, and the paperv and lathlng are brought'.v

One of the principal objects of the invention with marginal portions in overlapped relation,-

whereby upon severing of the continuous strip of paper adjacent the under or inner edge of the overlapped joint, the margin of the upper or outer sheet at the joint remains unbacked, this being desirable from the standpoint of use of the paper-backed lathing. f

Still another andv highly ini/portant object of the invention is the provision of means automatically severing the paper in the manner just mentioned during continuous advancement of the sheets and attached paper.

How the foregoing, together with other objects and advantages are attained, will'appear to better advantage from the following description of the preferred embodiment ofthe invention shown in the accompanying drawings, in which- Figure 1 is a somewhat diagrammaticside elevational view of the entire equipment;

Figure 2 is a substantially enlarged somewhat diagrammatic side 'elevational view of the feed conveyor adjacent the entrance end of the machine, this view also Vshowing the mechanism for applying adhesive to the paper;

. Figure 3 is a side elevational view of the automatic paper cut-olf unit of the mechanism;-

Figure 4 is an end v iew of the mechanism shown in Figure 3, taken from the left of Figure 3; and

Figure 5 is a fragmentary view of certain parts shown in Figures 3 and 4, illustrating a dierent position, as will appear more fully hereinafter.

lathing :n.-and advance the same through the transfer unit in which adhesive is applied to the together. Beyond the transfer unit the combined paper and lathing traverse the leveling rolls and 4then pass through the automatic cut-off mechanism (shown vin Figures 3 and 4), the severed sheets of paper-backed lathing'being finally discharged from the run-0H table.

The feed conveyor Sis carried by sprockets 'I and is provided with a series of angle members 8 spaced apart a distance a little less (for example, about an inch) than the length of lathing sheets 2:. Because of this it will be seen that the placing of a sheet on the conveyor just ahead of keach angle 8 results in a serial overlap of the end margins of the sheets. 'I'he sheets are fed into the transfer unit in this relationship.

As seem in Figures 1 and 2, the paper backing 9 is derived from a roll I0 and delivered over roll II and between rolls I2 and I3 into contact with rollers I4 which are mounted to dip into the vessel I5 containing adhesive (for example, some tarry -or asphalt compound). Rolls I2 and I3 may be knurled so as to provide increased keying of the adhesive to the paper. The paper then travels over an additional roll I6 between which and a companion roll l1 the lathing and paper are brought together and pressed so as to secure the paper to the lathing. Beyond the transfer unit the combined paper and lathing v sheets are further advanced by means of feed rolls I8 and I9 and then delivered to the multiplicity of rolls 20 in the leveling unit.

Next in line is the automatic cut-olf unit which is shown to best advantage in Figures 3 and 4. Supports 2l for the lathing appear in the upper part of Figure 3, these supports being mounted on the carriage or framing 22 which is mounted for sliding movement along the horizontal guide rods 23. The guide rods are supported by means of brackets 24 carried on a rigid base 25.

A shaft 26 is carried by and journalled in the two opposite side portions of the carriage or framing 22. This shaft has a pair of levers 21 -keyed thereon, the levers supporting a transverse By reference to Figure 1 it will be seen that in 55 with any suitable source of current.

terminals 30 which may be connected' shaft 28 further carries a pair o: Aadditional levers 3| also keyed thereon, and the free ends of these levers 3| are connected by means of links and the parts carried thereby are positioned so that the heater element 29 underlies the slot between the supports 2 I-2 I.

From inspection of Figure 3 it will at once be seen that the heater element 29 and shoe 35 are adapted to come together upon movement of shaft 25 in a counterclockwise direction. The heater element is, of course, then broughtinto contact with the paper on the under side of the lathing, and the shoe 35 exerts pressure on top during the burning operation. Resilience in the pressure of the shoe 35 is provided by means of springs 36 interposed between the arms 33 and the upper or freel ends of links 32. Thus the links 32 resiliently interconnect arms 33 and levers 3|.

Movement of shaft 26 in a counterclockwise direction may be effected by means of the actuating arm 31 which is extended downwardly from the shaft and at its lower end is connected with a link 39 extended generally `horizontally for connection with the chain 39 as by means of the pin 4l. This chain rides on a pair of sprockets 4I and 42. Pin 49 travels with the chain 39, in view of which, upon advancement of the pin upwardly and forwardly from the position shown in Figure `3, link 38 moves arm 31 in a counterclockwise direction, and this in turn imparts the same motion to shaft 26. As the pin 40 progresses along the upper run of the chain 39, the movement of arm 31 is arrested by means of additional arms 43 (see Figure 4) which cooperate with stops 44 rigid with the carriage 22. As the pin advances further, the link 38 (through the medium of levers 43 and stops 44) causes the entire carriage to travel along the guide rods 23. As the pin 4I! travels with the chain around the sprocket 42, the forward motion of the carriage ceases and the link 38 (around the under side of sprocket 42) again retreats, first causing arm 31 to move in a clockwise direction in` order to separate the heater element 29 and the shoe 35.` Additional rearward movement of the link 38 through the medium of pin 45 traveling on the return run of chain 39, draws the entire carriage back again to the position shown in Figure 3.

This motion is controlled and timed in synchronism with the rate of advancement of the lathing sheets over the supports 2 I-2 I For this Dlll'POse pin 48 also carries an abutment block 45 adapted to cooperate with a shoulder 46 formed on lever 41 which is pivotally mounted as at 48 at its upper end on the fixed bracket or support 49. This support 49 may also be employed to carry a solenoid 50, the armature I of which is connected with the lower end of lever 41 by means of link 52. Tension spring 53 always ensures return of lever 41 to the position shown in Figure 3, i. e. the position in which shoulder 4 6.

engages the block 45 in order to arrest movement of pin 4G and the chain 39.

Solenoid 58 is controlled in a manner described shortly below, but at this point it is noted that the sprockets 4I and 42 for chain 39 are carried by means of brackets 54 and suitable shafts and bearings4 mounted thereon. The shaft 55 for sprocket 42 also carries an additional sprocket 56 engaged with a chain 51 which is driven by sprocket 58 mounted on shaft 59. Shaft 59 in turn is driven in timed relation with the feed conveyor at the entrance end of the machine, a slipping clutch 68 being interposed in this shaft so that upon engagement of the shoulder 46 with the stop 45, the chain 39 will remain stationary until the stop 45 is released by actuation of the solenoid 58.

The solenoid is controlled by means of a switch 8| (see Figure l) provided with an actuating arm 62 disposed in the path of movement of the angles 8 carried by the feed conveyor 6. The circuit 63 (connected not only with the switch 6I but also with the solenoid) will, of course, include a suitable source of current.

In practice, the switch 6I is so located with respect to the conveyor 6 and the angles 8 moving therewith that the solenoid is tripped at the moment when an overlapped joint between adjacent sheets passes the gap between the supporting plates 2|-2I inthe cut-offmechanism. More specifically (see Figure 5), the solenoid is tripped and the latch 46 withdrawn at a time such that the heater wire 29 ermages the paper 9 just behind the rear edge 0f the sheet on the under side of each overlapped joint. Inspection of Figure 5 will illustrate the manner in which severing of the paper along this lline lwill leave an unbacked margin on the upper sheet of the joint. The travel of the carriage 22 with the lath during forward movement of the carriage affords sufficient opportunity for the heater wire to completely sever the paper.

Referring again to Figure l, the driving side of the clutch unit 60 is actuated by means of a suitable belt 64. This belt extends rearwardly and upwardly to a pulley 55 which, as will be seen in this view, is driven by additional belts 66 and 61. The belt 61 derives its power from shaft 68 which is driven by means of motor 14 through suitable belt drive indicated at 1I. The feed and transfer units are also both driven from this same motor, the transfer unit by means of belt 12, and the feed unit by means of chain 15, all appropriately coupled with the feed and transfer rolls and rollers. y

A motor 69 is provided for the purpose of actuating the rollers I4 in the transfer unit. The drive from this motor to the rollers includes belts 10 and 10a.

V Various of the driving connections per se are not of importance herein, particularly since any desired series of synchronized driving connections may be employed. It is only of importance that the several units all be actuated in synchronism, so that' the proper timing in movement of the cut-off carriage results, and further so that the solenoid- 50 is tripped at the desired point With relationto the end of each sheet as it passes through the machine.

While the equipment and method of this invention may advantageously be employed in the production of paper-backed lathing of a variety of styles or types, we prefer to produce a product ofthe general type disclosed in the copending application Serial No. 753,150, issued December 13, 1938, as Patent No. 2,139,749 of Thomas R. Herbest, Jr. In the production of material of this type, the adhesive is applied only in stripes,

. for which purpose the rollers I4 dipping into the present invention provides a completely automatic cut-oi forl the paper between adjacent lath sheets, and this While maintaining continuous uninterrupted feed of the sheets through the machine, even to the run-01T table shown in Figure l, from which the separated sheets may be automatically discharged as -by a conveyor 13.

It will also be noted that the invention provides means automatically determining the overlap of the sheets on the feed conveyor and thus of the margin which is left unbacked at one end of each sheet. l

We claim:

1. Apparatus of the character described including a conveyor for serially advancing lath sheets, abutment members projecting from and associated with said conveyor and adapted to position the sheets with adjacent marginal portions thereof in serially overlapped position, means for continuously feeding paper backing adjacent the path of movement of the sheets, means for securing the paper to the sheets, and means for severing the paper'along a line adjacent an edge of.

one of the overlapped margins of the sheets.

2. Apparatus of the character described including a conveyor for serially advancing lath sheets, abutment members projecting from and associated with said conveyor and adapted to position the sheets with adjacent marginal portions thereof in serially overlapped position, vmeans for continuously feeding paper backing adjacent the-path of movement of the sheets, means for securing the paper to the sheets, and means automatically operative in timed relation to the rate of advancement of said sheets for severing the paper along a line adjacent an edge of one of the overlapped margins of the sheets.

8. Apparatus of the character described including a conveyor for serially advancing lath sheets, abutment membersA projecting from and associated with said conveyor and adapted to position the sheets with adjacent marginal portions thereof in serially overlapped position, means for continuously feeding paper backing adjacent the path of movement ofthe sheets, and means automatically operative in timed relation to the rate of advancement of said sheets for severing the paper along a line adjacent an edge of one of the overlapped margins of the sheets, the severing means being mounted for movement with the sheets during the severing operation.

4. In the manufacture of paper-backed lathing sheets, the method which includes continuous serial advancement of lathing sheets in end-toend relation with their adjacent margins serially overlapped, continuously feeding paper backing with said sheets, securing the paper backing to the sheets, and severing the paper backing along a line adjacent each overlapped joint in the sheets during continuous advancement thereof.

5. In the manufacture of paper-backed lathing sheets, the method which includes continuous serial advancement of lathing sheets in endto-end relation with their adjacent margins serially overlapped, continuously feeding paper backing with said sheets, securing the paper backing to the sheets, and burning the paper backing along a line adjacent each overlapped joint in the sheets during continuous advancement thereof.

6. In the manufacture of paper-backed lathing sheets, the method. which includes continuous serial advancement of lathing sheets in end-toend relation with their end margins serially overlapped, continuously feeding paper backing with the sheets, securing the paper backing to the sheets, and severing the paper along a line adjacent the end of each sheet which is on the under or inner side of the overlapped joint.`

7. Apparatus for applying paper backingto lathing sheets including a conveyor for serially advancing the sheets, abutment members projecting from and associated with said conveyor and adapted to position the sheets with margins thereof in overlapped relation, means for continuously feeding paper backing with the sheets.

means for applying adhesivematerial to the paper, means for bringing the series of sheets and the paper into contact with each other to eiect attachment of the paper to the sheets by virtue of said adhesive material, and cut-oil mechanism for severing the paper along a line adjacent each 45 overlapped joint in the series of sheets;

RICHARD T. MCGEE. LEONARD W. CROSS.

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