US1864550A - Closing device for bag filling machines - Google Patents

Description

June 28, 1932. wI R. PETERSON CLOSING DEVICE Fon BAG FILLING MACHINES Filed Nov. 5, 195ol 2 Sheets-Sheet 1 y dum/M95 L June 28, 1932. w. R. PETERSON cLosING DEVICE Noa BAG FILLING MACHINES Filed Nov. 5. 1950 2 Sheets-Sheet Patented June 28, 1932 UNITED STATES PATENT OFFICE WILLIAM R. PETERSON, OF OSWEGO, NEW YORK, ASSIGNOR TO ST. REGIS PAPER COM- n PANY, OF NEW YORK, N. Y., A CORPORATION OF `:NEW YORK yping such a gate.

CLOSING DEVICE FOR BAG FILLING MACHINES Application mea November 5, 1930. serial 110,493,519.

This invention relates to a closing device for a bag lilling machine and more particularly for a machine adapted to till valve bags.

The purpose of the invention is to provide an automatic cut-oli of material fed to a valve bag when the weight of the bag reaches a predetermined amount. More particularly the object is to provide such a cut-of where the closing gate moves in a substantially horizontal` direction, and to provide a simple and elicient construction for automatically trip- Further objects and details of the invention will appear as the description proceeds.

In the accompanying drawings forming a part of this specication, Figure 1 is a side elevation of a gate and operating means embodying the invention, together with portions of a filling machine with which it is used; Fig. 2is a front elevation of portions of two filling devices with the gate closing means of Fig. 1 attached thereo, the two devices being shown Ain dilerent positions; Fig. 3 is a plan view of the parts shown in F ig.k2 Fig. 4 is a detail of a portion of a tripping device.

`In the construction shown in the drawings,

aframe supports a hopper 11 from which `material is fed through an outlet 12. This 4Voutlet is closed, when desired, by a gate 13.

In front of outlet 12 there is a lilling tube 14 adapted to enter the valve of a bag. Tube 14 is mounted upon an A-shaped frame 15the legs of which rest upon ends 16 of scale beams. A bag-carrying frame 17 is mounted upon the A-frame and may be moved by handle 18 rfrom its full line position to its dotted line position in that figure, in order to discharge the bag vafter it has been filled.

Attached to the end of gate 13 there is a link 2O connected to the lower end 21 of a lever `22 fulcrumed on the frame at 23. A bracket 24 mounted on the frame has extending therefrom a pin 25 on which there is fulcrumed a tripping lever 26. Lever 26 has an end 27 in line with a screw 28 adjustable in a block 29 attached to A-frame 15. Block 29 also has a lug beneath end 27 of lever 26 and ay screw 30 mounted in this lug adjusts the tension of a spring 31 bearing against the under side of end 27.

The other end of lever 26 carries a screw 32 adapted to contact a fixed lug 33 and limit the downward movement of that end of lever 26. This end also carries a wear block 34 with which there engages the end ofa tri member35. Trip member 35 is pivoted at 36 adjacent the path of lever 22 and carries an abutment yplate 37. On lever 22 there is mounted a pawl 38, which is normally swung by a spring 39 until its end 40 engages the block 41 on lever k22 to which the pawl is pivoted.

Lever 22 carries an arm 42 between which and a fixed lug 43 there is a strong spring 44.

The operation of the device is as follows After a valve bag has been placed in position with its valve over lling tube 14, lever 22 is swung from the position in which it is shown at the right of Figs. 2 and 3 to the position in which it is shown at the left of those figures. It will be readily understood that gate 13 comprises a plate which stops the discharge while the plate is positioned to the right, as viewed in Figs. 2 and 3, while it has a perforation in line with outlet 12 when it is moved to the left, as viewed in Figs. 2 and 3. Therefore, the movement of lever 22 in the manner described, opens gate 13 and allows material to be discharged through tube 14y into the bag.

During this movement to the right of lever ,22 spring 44 is compressed so that it constantly urges the lever and gate back towards closed position. However, during the movelment of the lever, pawl 38 yields and passes 'abutment 37 on trip member 35, but immediately when the end ofthe pawl passes member 37, it is snapped back into the position in which it is shown in Fig. 4 so as to prevent return movement of the lever as long as trip member 35 is retained in the position lin which it is shown in Figs. 1 and 4 and at the left of Figs. 2 and 3.

When beam 16 yields due to the weight of material fed into thefbag, screw 28 depresses the outer end of lever 26, thereby 4raising block 34 out of the path of trip mem- Y ber 35, whereupon the expansion of spring 44 through pawl 38 forces trip member 35 vto the position in which it is shown at the right of Figs. 2 and 3, which allows the paWl to pass stop member 37 and, therefore, the lever is swung to gate closing position and the feed of material through the tube into the bag is thereby cut oli". Thereafter the bag may be discharged by swinging cradle 17 to the position in which it is shown in dotted lines in Fig. 1. The apparatus is then ready to receive another bag and have the operation repeated. y

It will be understood that trip 35 is automatically returned toits .setposition by any suitable means as soon as paWl 38 passes stop member 37, so that it will be inl this position when the A-frame returns to its upper position and thereby lowers `plate 34C in the path of trip 35. It for any reason'trip 35 did not completely return to its setposition betore the upward movement ofthe A-rame, and plate 34 should encounterthe end o'f the trip member, spring 31 will yield 'sothat no damage is done and the openin'gmovement of the gate controlling lever 22is suilicient to completethe return of trip y35to its set position.

One of the advantages ot the disclosed construction is that lever 22 and link 2O move in the same plane as gate 13, so'that there is no tendency to bend the gate and cramp it in Vits slideway. Another advantage lies in the position ot the operatinglever 22 at one side ot the A-trame, so that it is accessible and does not interfere with any of the bag filling operations, and still is tripped bythe movement of the A-rame With a minimum of Working parts and With aminimum efforce applied by the -trame, so that the `Weighing operation is not disturbed by the tripping of the shut-ott' device.

YIt will be seen that a very simple and eili- `cient means has been devised for automatically closing the gate when a bag has received a sulicient amount of material, and that this automatic tripping is accomplished with the minimum of interference with the Weighing action.

`While the construction shown in detail in the accompanying drawings has been found eliicient and satisfactory, it will be readily understood that various changes may be made in the construction and arrangement of parts Within the scope of the appended claims.

W'hat I claim is:

1. In a valve bag filling machine, a discharge tube adapted to enter the valve .of a

g, a trame adapted to support abag in position vto .receive material from said tube, a vertically movable Weighing member supporting said frame, a horizontally movable gate controlling admission of material into the tube, a lever, a link connecting one end of the lever to the gate, a spring normally urging the lever .to gate-closingposition, and a trip device normally holdingthe leverin gate-opening position, and means connected with the frame for releasing the trip upon downward movement ot the frame.

2. Apparatus in accordance with claim 1, and in which the lever is mounted for movement in the same plane as the gate.

3. Apparatus in accordance With claim 1 andin which said trip device comprises a tripping member movable in a ,plane perpendicular to the plane of movement of the lever.

4. -Apparatus kin accordance with claim 1 and in which the trip-releasing means comprises a lever -mounted on a horizontal fulcrum and having one end in the path of a member on the trame and one end normally in the path of an end ofthev trip.

5. In a bag filling machine, a'tube adapted to discharge material into a bag, a frame adapted to support a bag in position 'to'receive material from said tube, a vertically movable Weighing member supporting 'said frame, a gate controlling admission ot'material to said tube, a lever mounted for movementin the same plane as thergate and connected to the gate, means constantly'urging the lever to gate-closing position, 'a tripfor holding the lever in gate-opening position, said trip being pivoted to move. in a plane perpendicular to the plane of movement of the lever and means for releasing the trip when Vthe frame moves downward.

6. In a bag illing machine, a tube adaptedto discharge material into a bag, a frame "adapted tosupport a bag in position'to're- `ceive material from said'tube, a vertically `movable Weighing member supporting 'said .fra-me, a horizontally movable-gate control- 'ling admission of `material to said tube, a lever having a pawl thereon and mounted "toi-movement in `the plane of the gate "and connected to the gate, means constantly'urging the lever to gate-closing position, a trip forholding the lever'in gate-openingposition, said trip being pivoted for movement in a plane `perpendicular to fthe plane "of 'fmovement of the lever and having'a short "endand a long end, the short end being adapted to engage a pawl on the lever, .a

" trigger mounted on ,a horizontal 'axis .with 'one end normally in the path of the long'entl of said trip,andmeans on the 'r'ameengaging the .other end of the `trigger upon'downwardmovement of the frame in response to the Weight of a bag thereon.

In testimony whereof I have hereunto signed my name to this specification.

WILLIAM R. PETER-SCN.

Images