Faber’s patent related to the construction of the common hand card used for carding cotton or wool prior to the spinning process. He specifically patented using wood veneer, instead of leather, for the foundation that contained the card’s wire teeth. The wood was cut from 1/8 to 3/16 of an inch in thickness, 4 inches in width, and 4 to 8 inches in length. The wood was then steeped in water to soften it so that when placed in a card-making machine, it could be pricked and the teeth inserted. The veneer was nailed to another piece of wood and a handle inserted to form the hand card.
Although Faber did not claim credit for inventing the card-making machine, in his patent specification he did mention that he had made improvements on it.