The Fountain Pen Patent Archive

The instruments that put ink under pressure

India-rubber ink sac

Line drawings of an 1848 fountain-pen holder showing an exterior view with cap and nib, an internal longitudinal cross-section revealing the india-rubber ink bag and cap-tube spring plug, a small cross-section of the bag recess, alternate cylindrical holder designs, close-up front and edge views of the quill nib with metal tip, and a separate india-rubber bulb ink pump.IMPROVEMENT IN FOUNTAIN-PEN HOLDERS AND NIBSAzel S. Lyman and Matthias W. Baldwin · September 19, 1848