Folding-machine for producing radiator units.

Application filed. August 31,

To dll whom it may concern:

Be it known that I, Salvatore Gargiulo, a citizen of the United States, residing at New Haven, in the county of New Haven 5 and State of Connecticut, have invented a new and useful Improvement in FoldingMachines for Producing Radiator Units; and I do hereby declare the following, when taken in connection with the accompanying 10 drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which, said drawings constitute part of this application, and represent, in—

Figure 1 a plan view of my improved machine.

Fig. 2 a view thereof in front elevation.

Fig. 3 a view thereof in vertical section on tbe line 3—3 of Fig. 1 with the parts 20 thereof in their functioning positions.

Fig. 4 a broken detail view in vertical longitudinal section on an enlarged scale showing the parts in the positions due to them after a unit has been folded.

Fig. 5 a similar view showing the unit after the die has been operated to concave the outer walls of the air-passage at the folded end of the unit.

Fig. 6 a detached perspective view of the 30 the bracket in which the forming-pin is mounted.

Fig. 7 a detached perspective view of the forming-pin lock.

Fig. 8 a detached plan view of the form35 ing-pin.

Fig. 9 a sectional view thereof on the line 9—9 of Fig. 8.

Fig. 10 a broken longitudinal section of the folded end of the unit showing the con40 caved outer walls thereof.

My invention relates to an improvement in folding machines for producing radiatorunits, the object being to produce, for the purpose indicated, a simple, compact and 45 accurate machine constructed with particular reference to convenience and facility of operation.

With these ends in view, my invention consists in a folding machine for producing 50 radiator-units, having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.

In carrying out my invention as herein 55 shown, I employ a forming-pin 10 of rec1916. Serial No. 117,828.

tangular cross-section in its general form but having its upper and lower edges flattened as at 11 and its front faces 12 correspondingly concaved. The said pin is formed at its inner end with a perforated 60 lug 13 adapting it to be mounted on a pivot 14 passing through perforations in the upstanding arms 15 of a yoke-shaped bracket 16 secured by a screw 17 to the machine-bed 18, whereby the pin 11 is pivotally mounted 65 so as to swing in a vertical plane parallel with the front of the machine. A leafspring 19 located in the bottom of a recess 20 in the bed 18, extends between the upstanding arms 15 of the bracket 16 and has 7 0 its upper leaf engaged with the lower face of the forming-pin 10 at a point forward of the pivot 14 thereof. Near its pivoted inner end the forming-pin 10 is surrounded by a supporting-shoulder 21 which functions 7 5 during the folding and concaving operation. At its outer or free end, the pin 10 is formed with a tapering locking projection 22 adapted to co-act with a locking-recess 23 in the shouldered inner end 24 of a forming-pin 80 lock 25, rectangular in cross-section and having longitudinal movement in the right hand end of a V-shaped folding-groove 26 at the front end of the machine-bed 18 which is also formed with a similar parallel groove 85 27 back of which the bed is cut away at 28 to form a shallow channel the full width of the unit-blank 29. The outer wall 30 of the groove 26 is convexed for a distance equal to the space between the inner edges of the 90 shoulders on the unit-blank 29, while the inner wall 31 of the groove is made flat.

The lock 25 is formed in its upper face with a transverse notch 32^a for the reception of the reduced and rounded forward end 32 95 of a lever-handle 33 pivoted upon the machine bed by means of a screw-stud 34, the rear end of the handle being upturned to form a finger-piece 35. By means of this lever-handle 33, the lock 25 is moved Ion- 100 gitudinally in the groove 26 for its locking and unlocking co-action with the projection 22 of the forming-pin 10.

For utilizing the forming pin 10 in folding a previously corrugated unit-blank 29, 105 I employ a leaf-like folder 36 furnished with a depending handle 37 and hung upon trunnions 38 entering brackets 39 secured by bolts 40 to the edges of the machine-bed 18. Normally the folder 36 is in its retired posi- 110

1,337,195 tion as shown in Figs. 1, 2 and 5 in which it hangs downward in a vertical plane from the front of the bed 18. The upper edge of the said folder is formed, as shown in Figs. 5 1 and 2, with two shallow transverse grooves 41 respectively coinciding in position with the supporting-shoulder 21 of the formingpin 10 and the shouldered inner end 24 of the sliding lock 25. The upper edge of the 10 folder is also formed with notches 42 and 43 for the clearance, respectively, of the bracket 16 and the end 32 of the leverhandle 33, when the leaf is swung up into its folding position in which it is shown in 15 Fig. 4.

For concaving the outer walls 44 of the air-passage at the folded end of the unit, I employ a pivotal die 45 mounted at its left hand end upon a stud 46 in a bracket 47 20 secured by bolts 48 to the machine-bed 18, the said die swinging, as thus arranged, in the same plane as the forming-pin 10. The lower edge of the said die 45 is formed with a longitudinal V-shaped groove 49 haying a 25 con vexed outer wall 50 and a flat inner wall 51 respectively corresponding to the convexed outer wall 30 and the flat inner wall 31 of the groove 26 in the bed 18. The lower edge of the die 45 is also formed with trans30 verse clearance grooves 52 and 53 respectively clearing the shoulders 21 and 24 aforesaid.

In the use of my improved machine, a previously corrugated radiator unit-blank 35 29 is inserted into the machine under the normally elevated forming-pin 10, so that the central portion of the blank will be substantially under the forming-pin with one of its corrugations in the forming-groove 26. 40 At this time, substantially the inner half of the blank will lie in the channel 28 of the bed 18, while the remaining half of the blank will project in front of the machine over the leaf-like folder 36. The forming-pin 10 is 45 now manually swung down into its horizontal position, whereby it forces the corrugation directly beneath it into the groove 26 as shown in Fig. 4. The forward end of the blank is thus lifted into the inclined position 50 in which it is shown by broken lines in the said figure. The lever-handle 33 is now operated to slide the lock 25 from right to left to enter the projection 22 of the pin 10 into the opening 23 and so hold the pin in its 55 depressed position. The handle 37 is now grasped and the leaf-like folder 36 swung from the position in which it is. shown by broken lines in Fig. 4 to the position in which it is shown by full lines in the same 60 figure, whereby the corrugated blank 29 is folded upon itself. The folder 36 is now swung back into its normally retired position after which the die 45 is swung from left to right so as to impinge sharply upon the outer 65 passage of the folded radiator unit as shown in Fig. 5, whereby the convexed outer wall 50 of the groove 49 in the die and the convexed outer wall 30 of the groove 26 in the machine-bed 18 co-act with the concaved faces 12 of the forming-pin 10 to concave 70 the. outer walls 44 of the outer passage of the radiator-unit. In this connection it may be stated that the parts are made with sufficient freedom of movement so that when the die 45 is swung downward, the forming-pin 75 10 will be driven downward from the position in, which it is shown in Fig. 4 to the position in which it is shown by Fig. 5 which is necessary for the concaving of the walls 44. The shoulder 21 of the pin and 80 the shouldered end 24 of the lock 25, prevent the concaving of the outer walls of the said passage from extending too far toward the edges of the unit-blank.