Reinforced toner seal tear strip construction
OwnerLester E. Cornelius, Colin Davisoninventors
Life of this patent
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Abstract
A synthetic resinous tear strip seal or toner cartridge used in electrostatic copy machines, in which the longitudinal central area of the strip is reinforced by laminating additional planar material thereto in the area overlying the elongated opening in the toner cartridge, and preferably along at least part of the tear strip. The material may be similar to that of the seal, or of other material selected for electrostatic conductivity to dissipate the electrostatic attraction of the seal material to the toner particles in the toner cartridge hopper. Typically, a thin coating of aluminum is applied to the material which is of a synthetic resin.
Claims14
A synthetic resinous toner seal of tear strip type for electrostatic copiers comprising:
- a base lamina of material having a principal axis, and formed by extruding parallel elongated fibers which are axially oriented in fused relation, wherein a central axially oriented portion of the lamina may be torn along said axis to form an elongated opening for the passage of toner;
- and a second reinforcing lamina of substantially congruent configuration at least partially laminated to a surface of said base lamina over mutually contacting surfaces, said second lamina being formed from axially oriented fibers, which when laminated are parallel to the fibers of said first lamina, whereby said first and second laminae may be torn as an integral centrally located tear strip.
The method of making a seal for toner cartridges comprising the steps of:
- a) providing a strip of material having a principal axis formed of fused elongated fibers, and having a given width;
- b) providing a second strip of material formed of fused elongated fibers having a second principal axis, and of width corresponding to that of said first strip;
- c) placing said first and second strips in congruent relation, and;
- d) laminating said first and second strips over an axially oriented centrally disposed area to form an integral tear strip portion.
A seal for enclosing a slotted opening in a toner cartridge forming part of an electrostatic copying machine, said seal including an elongated strip of molecularly-oriented synthetic resinous material forming a first lamina, said strip having an axially-extending manually engageable tear strip extending from a centrally disposed area of an end of said first lamina therefrom to form an elongated opening overlying said opening in said toner cartridge, and a pressure sensitive adhesive layer forming a second lamina having first and second surfaces, a first surface being adhered to a surface of said first lamina, and a second surface selectively adhered to a surface of said toner cartridge bordering said slotted opening, the improvement comprising:
- said surface of said first lamina having a coating of a material capable of dissipating normally occurring electrostatic charges present in said first lamina.
Dependencies are inferred from the claim text.