Plotter having a support platen of angular profile

Details Plotter having a support platen of angular profile Plotter having a support platen of angular profile

1988-11-23

1990-04-10

Miller, Jr., George H.

Recorders

Record receivers and/or driving means therefor

Web

400578, G01G 1908, B41J 1500

Patent

active

049164660

ABSTRACT:
A paper sheet (10) is supported by a platen (30) having a horizontal central portion (31, 41, 51) including the write path and having front and rear portions (40, 50) for supporting the sheet in front of and behind the central portion. Each of the front and rear portions comprises a plurality of plane faces (42, 43, 44; 52, 53, 54) interconnected by horizontal edges (46, 57; 56, 57) and forming increased angles (a, b), relative to the horizontal. The selected shape of the edges and the faces is such that when the sheet (10) is resting against the second and third edges (46, 47, 56, 57) it is constrained to keep off the first and second faces (42, 43, 52, 53) and to lift above the level of the central portion (31) prior to coming into contact therewith. Thus, the sheet (10) is constrained to pass from a convex shape to a concave shape via a line of inflection, thereby increasing the stiffness of the sheet and thus increasing its resistance to deformation and opposing any tendency of the sheet to lift off the platen at the write path.

REFERENCES:
patent: 4369453 (1983-01-01), Brandt
patent: 4512505 (1985-04-01), Westly et al.
patent: 4683476 (1987-07-01), Ferrari et al.
patent: 4734987 (1988-04-01), Cleveland
Hewlett-Packard Journal, Nov. 1981, pp. 34-36.

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