Sholes and Glidden typewriter seeking to diversify, Remington further refined the typewriter before finally placing it on the market on July 1, 1874. During its development, the typewriter evolved from a crude curiosity into a practical device, the basic form of which became the industry standard. The machine incorporated elements which became fundamental to typewriter design, including a cylindrical platen and a four-rowed QWERTY keyboard. Several design deficiencies remained, however. The Sholes and Glidden could print only upper-case letters—an issue remedied in its successor, the Remington No. 2—and was a "blind writer", meaning the typist could not see what was being written as it
Paint roller secured to the cylindrical core. Foam rubber rollers are also produced. There are both foam and fabric rollers that are individually available (without a handle), made to replace worn out rollers, once an old roller is removed the new roller can be fitted onto the handle section for use. An innovation of the cylindrical core has allowed it to contain paint inside, with the cover absorbing paint from the inside and filtering it through (naturally by wicking) to be applied externally, when the roller is rolled. In 1938 Morris Welt was a painting contractor in New York City. His son,