Method for registering anode and cathode layers on a web

A method for accurately registering individual and successive anode deposits on one face of an advancing web with individual and successive cathode deposits on the opposite face of said web by means of a nip formed by a coating roll and an apertured surface which comprises the steps of:

• advancing a continuous flexible elongated web, bearing longitudinally spaced apart, individual, successive dried cathode deposits, through said nip with the cathode deposits under the web and supported on said apertured surface;
• exerting suction through said apertured surface in advance of, at, and in rear of said nip to pull said advancing web downwardly out of its normal plane in the portions extending around each said cathode deposit;
• and, while said web is so pulled out of its normal plane, reverse roll coating a plurality of individual and successive deposits of anode slurry from said coating roll in said nip on the exposed face of said web each registering substantially exactly with the pattern and periphery of the individual and successive cathode deposits on the under face of said web
• and then drying said anode slurry deposits.

A method for continuously making continuous, elongated webs of electrically conductive, flexible material having individual and successive deposits spaced therealong, each deposit comprising a cathode layer on one face of the web and an anode layer on the opposite face of the web, said cathode and anode layers being in substantially exact peripheral registration with each other:

• by means of a smooth faced coating roll forming a coating nip with the apertured face of a suction roll;
• said method comprising the steps of;
• advancing a web of predetermined thickness along a path up to and through said nip with one said layer deposited on one said surface thereof in individual and successive, spaced apart, dried deposits of predetermined thickness;
• supporting said one surface of said web, and the said dried deposits thereon, on the apertured face of said suction roll at said nip while exerting suction thereon to draw the area of said web around said deposits out of the normal plane thereof;
• and
• roll coating the other said layer as a slurry, on the other said face of said web at said coating nip, while said suction roll is drawing the area of said web surrounding said one layer out of the plane of said web at said nip;
• and then drying said other layer;
• whereby no deposit is made on said surrounding area and deposit is made only on the face of said web opposite said one layer deposit to exactly register therewith.

The method of exactly registering electrode deposits on one face of a web with spaced dried electrode deposits on the other face of the web by means of a nip formed by a coating roll and a suction roll which comprises the steps of;

• forming a plurality of individual and successive solidified electrode deposits on one face of said web and advancing said web through said nip with said solidified deposits supported on said suction roll;
• exerting suction through the surface of said suction roll to draw the portions of said web around said solidified deposits out of the normal plane of said web and away from the surface of said coating roll;
• applying a slurry of the other said electrode on the other said face of said web in said nip while said suction is so exerted;
• and then continuing the advance of said web through a drying zone to solidify and dry the electrode slurry so deposited on said web in said nip.