Rensselaer Republican, Volume 23, Number 51, Rensselaer, Jasper County, 20 August 1891 — How Tin-Plates Are Made. [ARTICLE]

How Tin-Plates Are Made.

Iron, In view of the present crisis in the South Wale 3 tin-plate trade, the following particulars of the Morewood process of tinning plates, now in U6e at the works of the United States Iron and Tin-plate Company, limited; Dammler, Pa., may be of interest: The plates are rolled in the ordinary manner into black sheets, eight of these sheets being rolled at one time, and after being sheeted to size are put in the black pickle bath of sulphuric acid, where all oxidation is removed. They are then placed in an annealing furnace for thirty-six hours, after which they are passed through the cold rolls, receiving a smoothly polished surface. They are annealed again and put into the white pickle, where they are thoroughly cleansed from any oxidation. They are then ready for the tinning process. The mode of putting on the coating of tin is very simple. The plates are first submerged In a bath of palm oil until all the water disappears, the iron forming a flux for the tin, the first coat of which is received in the tin pot; the plates are next diped in the “wash pot,” and when taken out the tin is spread over the service with a brush by hand. The final act in the tin coating process consists in passing the plates through rolls running in palm oil, whereby the tin is evenly distributed and a smooth surface obtained. There are five of these rolls used, three running on top of two, and the plates make two passes., through them, in the first place being let down through the first and second of the upper set, and by a cradle arrangement being returned through the second and third, This completes the tinning operation proper, and the polish is obtained by rapid movements of the plates through bran and middlings, respectfully, and then polished with sheepskin. The result obtained at the Demmler works is a very excellent article of bright tin-plate.