US1765814A

US1765814A - Apparatus for separating glass sheets

Info

Publication number: US1765814A
Authority: US
Inventors: Charles H Wright
Original assignee: Pittsburgh Plate Glass Co
Current assignee: PPG Industries Inc
Priority date: 1928-08-30
Filing date: 1928-08-30
Publication date: 1930-06-24
Anticipated expiration: 1947-06-24

Description

June 24, 1930.

C. H. WRIGHT APPARATUS FOR SEPARATING GLASS SHEETS Filed Aug. 30, 1928 2 Sheets-Sheet 1 l A a d- INVENIOR girg June 24-, 1930. c wR|GHT 1,765,814

APPARATUS FOR SEIFARATING GLASS SHEETS Filed Aug. 50, 192a 2 Sheets-Sheet 2 INVENTOR portion of a continuously ture of sheet Patented June 24, 1930 I OEABLES n. wnren'r, or amour vnm ron, onro, ems COMPANY, 11 scar-cannon ASSIGNOB T0 PITTSBURGH PLATE OF PENNSYLVANIA urmrus r013. snrana'rmeetass snanzrs Application fled-Iugnst 30, 1928. Serial No. 802,997.

' The invention relates to apparatus for cracking ofi or separating glass sheets or sections from acontinuously formed ribbon of glass, such as is produced in the manufacglass by the Slinglufi, Fourcault or Colburn processes. It has for its objects the provision of improved means for applying a cooling agent to theline of heating, as produced by the electrically heated ribbons employed in the Slinglufi' cracking olf apparatus of Patent No. 1,373,533. A further object is the provision of means which may be operated either automatically at fixed intervals, or by the foot of the operator leaving his hands free to support the lass as soon as it is cracked oifp One emdiment of the invention is illustrated in the accompanying drawings, wherein:

Figure 1 is a front'elevation of the apparatus. And Fig. 2 is an enlarged detail section on the line II-II of Fig. 1.

Referring to the drawin s, 1 is the upper ormed glass rib bon or sheet produced by a machine of the Fourcault or Slinglufi type located beneath the floor 2, the upper two rolls 3, 3 only of the set by means 0 which the sheet is moved up being shown. Extending transversely of the sheet on opposite sides thereof are the cracking off bars 4 and 5 of channel cross section provided on their inner sides with the

insulatin strips

6,6 and resistance ribbons 7, 7. hese bars are carried by the frames 8, 8 supported by the

cables

9, 9, pass ing around

pulleys

10, 10, and secured at their ends to the

counterwei hts

11, 11. The bars are moved toward eac other at timed intervals to engage the sheet by solenoids, not shown, this part of the apparatus being similar in general construction to that shown in the Slinglufi' patent heretofore referred to.

The

chilling devices

12, 12 are carried by the bar 4, being supported upon

brackets

13,13 secured to the bars by the screws 12.

r The chilling devices are similar so that a description of one will sufiice for both. Two

at each edge of the sheet, as indicated in Fig. 1, to insure a moredevices are used, one

positive action, but the sheet may be satissufliciently to cause factorily cracked oil by the use of only one device. The device includes a metal cylinder 14 (Fig. 2) secured to the bracket 13' by a-pair o f

U-shaped clamps

15, 15 whose threaded ends extend through the bracket and are provided with the

nuts

16, 16.

Mounted in the cylinder 14 is a piston 17 havinga stem or rod 18 threaded through I the end of the sleeve 19. Slidably mounted in the sleeve is a plunger 20 whose rear end is provided with a valve 21 normally pressed against the seat 22b a spring 23. A spring 24 normally holds tile stem 18 and sleeve 19 in retracted position so that the tip of the lunger 20 is out of contact with the sheet 1.

he rear end of the sleeve 19 is supplied with water from the tank 25 (Fig. 1) through the pipe 26 provided with a regulat ing' valve 27. The 'plunger 20 has a relatively loose fit in the sleeve 19, so that when the valve 21 is in open position, as shown, water willwork its way down along the plunger from the cavity above the valve and thus cool the plun er.

' .The rearTend o 1 the cylinder 14 is supplied with air from the line 27 (Fig. 1) and the

connections

28 and 29. A valve 30 is located inthe line 27, such valve being under control of the solenoid 31 and of the foot pedal 32. The

connections

33, 33 suppl current which maybe controlled by a pus button or by automatic means. The foot pedal offers an alternative methodof-Qontrolling the valve, or both controls maybe used depending on conditions. After the glass has been heated by the IlbbODS 7, 7 along the band A, the bars 4 and 5 are caused to separate and move back to the position shown in Fig.2. The valve 30 is now opened admitting pressure to the cylinder 14 above the piston 17 causing such piston to move down and moving the sleeve 19 down until the tip of theplunger 20 engages the glass, as'shown. The wetted plunger engages the heated band A and chills it the glass to crack along the lineof heating. The downward-movement of the sleeve 19, after the plunger engages the glass, causes the valve 21' to open, thus permitting a small amount of water'to flow downward along the plunger which is 24 7 moves the piston from a forwardly moving sheet or ribbonof sheet transverse y cracked, a chilling tool adjacent the line of l that in one glass comprisin means for heating the along the line to be movement of' the sheet and mounted for movement toward and from the sheet, so osition it' touches the sheet on the line to e cracked, means operated by the movement of the tool to supply a fluid so as to chillthe tool, and means for movingthe'tool. p o I o 2. Apparatus for cracking ofi' sections from a orwardly moving sheet or ribbon of glass comprising means for heating the sheet transversely along the line to be cracked, a chilling tool adjacent the line of movement of the sheet and mounted for movement toward and from the sheet, sov

that in one position it touches the sheet on the linerto be cracked, means operatedvby the movement of the tool to supply a liquid which wets the tool, and means for moving the tool. I V s V 3. Apparatus for cracking ofi' sections from a forwardly moving sheet or ribbon of glass comprising means for heating the sheet transversely along the line to be cracked, a chilling tool adjacent the line of movement of the sheet and mounted, for movement toward andfrom the sheet, so that in one position it touches the sheet on the line to becracked; and fluid pressure means for giving the tool its movement-toward and from the sheet.

4. Ap aratus from a iorwardly moving sheet or ribbon of glass comprising means for heating the sheet transversely along the line to be. cracked, a chilling tool adjacent the line of movement of the sheet and mounted for. movement toward and from the sheet, so that in one position it touches the sheet-on the line to be cracked, liquid supply means leading to the tool, a valve operated by the movement of the tool for permitting avfiow of the liquid from the supply means to wet the tool, and means for moving the tool.

I 5. In apparatus for cracking ofi sections from a forwardly moving sheet' or ribbon v of glass comprising means for heating the 7 sheet transversely along the line to be cracked, a chilling tool adjacent the line of movement of the sheet and mounted for movement toward and from-the sheet, so

for cracking ofi sections that in one position it touches the sheet on the line to be cracked, liquid supply means leading to the tool, a valve operated by the movement of the tool for permitting a flow et or ribbon that in one position it touches the sheet on the line 'at' which the ribbon has engaged such sheet, and means for giving the tool its movement toward and from the sheet;

In testimony whereof, I have hereunto subscribed my name this 30th day of July,

CHARLES H. WRIGHT.