JiXY 1, 1921 



THE INDIA RUBBER WORLD 



747 



MOTOR-POWER ROLL ADJUSTMENT FOR CALENDERS 



Calender rolls are adjusted in relation to the intervals between 

 them, by an arrangement of screws and gearing actuated by 

 a hand-wheel, but a motor-driven mechanism provided with a 

 fine indicator for effecting the roll adjustment is preferable. The 

 accompanying illustration shows a special attachment designed 

 for very close adjustment of the middle and bottom rolls nec- 

 essary in running sheet stock to accurate gages. This mech- 

 anism is driven by a 24-h.p. motor through a cone friction clutch. 

 A small lever at the right operates the clutch connecting the 

 driving shaft to either upper or lower roll adjustment as desired. 

 The large lever at the left operates a clutch which connects the 

 drive-shaft to either motor or hand-wheel. The han(,l-\vheel is 

 retained as an emergency means for oiwrating the roll adjustment 

 if the motor should be out of service. 



The motor controller is of the automatic type operated by 

 three push buttons which are marked "Up," "Down" and "Stop." 



ternate with the threads of the other and are then stuck together 

 with rubber composition to make a "woofless" fabric. The proper 

 distribution or laying together of the threads is done b; thread- 

 ing them through combs as guides at points B, B' and C, 



The Bouruin Cord F.^bric M.achine 



The first coating of rubber is applied at the group of water- 

 cooled rollers D from which the fabric passes on in contact w-ith 

 the steam-heated cylinder E. 



It then passes on to be again coated over the water-cooled 

 roller F by a knife G the variable slope of which permits regula- 

 tion of the coating. Continuing on around the drying cylinder 

 I-. tlie fabric reaches the water-cooled roller H. From this point 

 the other side of the fabric is similarly coated and dried in a 

 second section of the machine. The finished fabric coated on 

 both sides is finally wound up at / with a cloth liner to prevent 

 adhesion. — Manufactured by A. Olier, 10 rue Beaurepaire, Paris, 

 I'Vance ; agents, L. J. Broche and F. Chassaing, 21 rue de la 

 Station, Alfort (Seine), France. 



\ AiGHX Electric.\llv-Drivex Calender-Roll Adjuster 



AKRON RUBBERMOLD TRUCK-TIRE VULCANIZER 



The Akron Rubber Mold & Machine Co., Akron, Ohio, builds 

 a complete line of vulcanizer equipment for tire repair, mcluding 

 giant pneumatic truck-tire molds for 6, 7, 8, 9 and 10-inch cord 

 tires in both flat and round tread. 



The improved Type A mold has been redesigned to accommo- 

 date cord tires as well as fabric tires. This is a three-cavitv outfit, 



To operate the mechanism the clutch lever at the left is pulled 

 down, thereby connecting the motor to the driving shaft. The 

 small lever at the right is placed in the proper position for 

 driving the upper or lower rolls as desired and the adjustment 

 then made by pushing the proper buttons of the control. The 

 movement of the rolls is very accurately shown by the large 

 dial, it being easily possible to estimate a movement of one-half 

 of one one-thousandth of an inch. 



It is possible to reset the pointer on the dial at any time so 

 that the movement of the rolls from that point can be read 

 directly. The control for the motor is verj' positive so that it 

 is possible to make accurate and small adjustments as well as 

 larger ones. The friction drive is designed so that it will slip 

 before the rolls are injured, should the motor be left running 

 after they have come together. 



CONTINUOUS CORD-TIRE FABRIC MACHINE 



A novel machine of French design and manufacture for pro- 

 ducing rubl)erized cord tire fabric without woof threads is shown 

 in cross-section in the accompanying illustration. The course 

 of the fabric in the making is indicated by the heavy line and 

 arrows. 



Beginning at A and A' in the figure, two chains of parallel 

 threads of indefinite length and a width equal to that of the 

 fabric enter the mechanism from overhead on either side of the 

 machine. The threads of each of these chains successively al- 



AkRON RuDBERMOLD Vui.C.'iNIZER 



with self-contained steam boiler, tube plate and inside patch vul- 

 canizer attachment. Type F equipment is designed to accommodate 

 fabric tires only. Type F is a two-cavity outfit with self-con- 



