Mr. Frederick Burt Zincke obtained a patent in England, bearing date December 9, 1836, for the following mode of preparing the filaments of this plant, the "Bromelia ananas." We give the patentee's own description (with slight emendations), as received from the patent office, London, and which is as follows.
"I (the said Frederick Burt Zincke) do hereby declare that the nature of my said invention consists—Firstly, in preparing or manufacturing the leaf of the plant, commonly called the pine-apple, by bruising, beating, washing, and drying the same, in such manner as to separate the long fibrous parts from the cuticle pabulum, and other matter comprising the said leaf. Secondly, in the application of the fibrous substance, so prepared to various manufactures and purposes, for which silk, flax, cotton, hemp, wool, and other fibrous materials are now used. And further, I describe the manner in which my said invention is to be performed by the following statement: For the purpose of preparing the fibre, I cut the leaves from the pine-apple plant, at any period from the time of their obtaining their full growth, till the ripening of the fruit, for I find that if the leaves are taken before they are full grown, the fibre is less strong, and if suffered to remain on the plant, after the ripening of the fruit, the fibre becomes harsh, and is more difficult to divest of the extraneous matter. The small thorns having been trimmed from the edge of the leaves, with a sharp knife, the leaves should be crushed, so as to disengage the fibre from the other matter composing the leaf, for which purpose the employment of a mallet upon a block of wood, will fully answer the intended purpose. This process of crushing is to be continued until the fibre appears in an assemblage of long silky filaments, with more or less of the pulpy and other matter of the leaf adhering to them; to cleanse them from which they are to be well rinsed in soft water, immediately after having been crushed or beaten, and then the water should forthwith be squeezed out of them, by drawing them between the edges of two pieces of wood, placed parallel to each other, so as to admit of the fibres being drawn out rather lightly between them, for if the green matter is allowed to dry on the fibre, it of course
