in the manufacture of brunswick tires each chord is drawn from each individual school guided by thousands of tiny eyelets the cords are carried to a specially conditioned room where the temperature and moisture are strictly maintained to preserve full strength and es high end to friction properties which give further protection against internal friction and where the angle of the cogs in the ply stock is an important factor in the life of the tire because a definite angle is necessary to give proper balance to the b tire is the beat and wire used as a braking strength of two hundred eighty thousand pounds per square inch each strand is thoroughly insulated with a special rubber compound then automatically formed into a circular ban these machines mix eight hundred pounds at a time and then dump the bags to a conveyor belt which carries it to a series of large cylindrical rows called mill for further mixing with additional compound these mills not only mix of other but needed as well much as bread dough is needed before baking another male heats and prepares the sock cutting it into a large thick continuous ribbon the for it is fed into a machine which forms it into proper shape in weight and thickness here it begins to look something like a tire which provides the positive adhesion between the trade and the caucus at the end of this long conveyor is an automatic cutting machine which measures out and cuts the thread stock into the exact length required for different size tires further check however is made on the weight of each strip of tread stuck to assure proper balance the time if the weight is off a fraction of an ounce the strip is rejected in the tire be erling room the components are assembled flyers beads flippers trade stop finishing strips and double shock absorber units made ready for tired of this skilful operators with years of training and with equipment of the most modern type this cylind shape machine is called a drum each pliers roll accurately and smoothly into place one ply at a time a system of rollers shaped the pliers to the drum and press out all air pockets between the pliers in order to produce positive union of all parts of each ply after the second lies rolled out the beads are placed on each side the flipper strip surrounding the evenly distributed above the point of rim contact i think stop trying to stop these next play smoothly and evenly over the entire crack at the end splice securely together these roll firmly and when it's removed from the building from its in the form of a hollow cylinder a quick application of heat and the closed water at a temperature of three hundred degrees fahrenheit and at a pressure of two hundred forty pounds the square inch is false in the water bags inside the tire at the same time steam temperature of three hundred degrees fahrenheit is applied to the outside of the mo by flushing the most with cold water to prevent any possibility of over curing remove from the vulcanize is too long conveyor system a mole is a cracked open and they tires removed imperfections overall of every tire must check with the exacting specifications set for a specification set by one of the most outstanding groups of research engineers and chemists in the industry in the research laboratory there's a constant quest for the better than best day after day the search for new developments and product innovations is diligently carried on anticipating the needs of tomorrow new formulas new compounds are developed in a miniature factory toylike in comparison to the huge equipment of the plant but exact in detail are the ben very mixing machines mills calendars and vulcanized here small experimental batches of rubber are carefully compounded mixed in miniature millions rolled into sheets on small calendars and cured in tiny ovens samples of these q and sheets of rubber compound are tested for their strength stretch elasticity and resistance to where every new compound is also tested for flexibility and its resistance to heat set up by friction stretch and breaking points of cords are constantly being checked and charted on ten psi strength machines this laboratory checked not only experimental materials but samples of all raw materials used in production as well welded together of vulcanized by various experimental methods and compounds are flexed and tormented by specially designed flexing machines to determine their adhesive properties other times i have strength machines are used for pool test to measure the number of pounds necessary to tear the tread from the carcass this test proves the positive adhesion attained in brunswick super service tires by the double shock absorber unit not only on a cold cool test but on heat test as a section of the laboratory known as the torture chamber it's aptly named because a tire that will run this gauntlet of tired instructing mechanisms and survive truly earned its right to be called one of the finest tires ever built here is  brunswick super service inflated to a pressure of four five six times its regular inflation point pressure is forced into it until it bursts and then conducting these tests are protected by heavily insulated partitions found by pound water is forced into the tube under pressure another device is used to test the possible injury to a tire as a result of hitting into curb the road obstructions a tire is mounted on a heavily weighted steel rim and dropped on an iron cleat this is repeated many times with a tire at many degrees of under inflation in an effort to penetrate the protecting wall of the double shock absorber unit on the sprague machine the old retired doesn't last very long because here is a test that compares only with the continuous run it incredibly high speeds over the roughest possible road for thousands of miles without a stop the tires are forced against a large dynamometer wheel a car load weights the rough surface provides traction for the tires which pull against a dynamometer load heavy iron cleats fastened to the under these conditions an ordinary tire soon fails but the brunswick super service when put to this test proves definitely its resistance to destructive high speed flexing by running continuously for the equivalent of ten thousand miles without  comparative tests are made against competitive tires to determine the degree of heat set up inside the tires when run on the spring machine thermal couplings are used to measure the internal heat set up under varying degrees of speed and low pressure and tires that are built with show a much higher temperature under the tread than the burn which super service weights insulated cord construction even when run in heat rooms where the temperature is kept at one hundred fifteen degrees brunswick super service tires have passed the spray test with no but the most dramatic test of all is the pile driver here heavily weighted steel wage is suspended over the tire guided by a smoothly polished and grease runners it's drawn up a tall sh strikes the tire with terrific impact sometimes rebounding thirty feet or more no or after each test in the torture chamber the tires are sent to the section of the laboratory the tires are cut down ply by ply and study for possible signs of injury or failure if a tire fails the cause of failure is immediately the final test of a tire is on the road and their actual operating conditions brunswick is one of the few companies in the industry that maintains a large fleet of test cars and trucks this test plate proves conclusively the long safe mileage built in brunswick types day after day week after week brunswick tires are subjected to every condition of road surface and speed over smooth highways opryland down over rough roads and bumps that few drivers ever encounter accurate records of mileage and speeds are diligently kept the tires are shifted and rotated around each wheel every three hundred miles so that where conditions are uniform and these tests are continuous with time out only for refueling or a change of drivers running twenty four hours a day carrying on through the in all kinds of weather these tests are ultimate proof of the performance quality and safety of brunswick super service tires