US3859960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing machine with electrostatic web developing apparatus
Assignee: Versatec Inc
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Filing: 1973-02-26
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Granted: 1975-01-14
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Expires: 1993-02-26
Abstract
Abstract A printing machine wherein a pliable record material wrapped to form a supply roll includes means for recording information upon the record material, an upwardly inclined platen supports and guides the record material upwardly, and means for feeding the material engages same at the lower end of the platen and serves to push the pliable material up the platen. An air stream impinges upon the material while the material is moving upwardly across the platen to maintain the material in a flattened state against the platen preventing buckling thereof during its upward travel. The supply roll is mounted upon a readily removable support providing a modest restraint from within the core of the supply roll. A fountain of developing toner fluid is disposed to contact the recording material immediately upstream of an upwardly extending wiping means for removing excess toner fluid from the web of recording material when drawn thereacross.
Inventors
- 👤 William A Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:37
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6597; G03G15/06; G03G15/10; G03G15/101; G03G15/22; G03G15/32; G03G15/321
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
328 words
In an electrostatic printer of a type using a length of record material wrapped to form a supply roll to be fed along a path as a web through a printing station for electrostatically charging discrete portions of said web, apparatus for developing said portions comprising a supply reservoir of liquid toner material, a first elongate tray having relatively thin upwardly disposed walls extending substantially horizontally across the path of said web and lying beneath same, a second elongate tray containing said first tray and encircling the periphery of said first tray, said second tray having relatively thin upwardly disposed walls extending transversely of said web, said transversely extending walls being spaced well clear of the fIrst named said walls to form a catch basin surrounding the first named tray to receive liquid toner material overflowing into the space defined between the walls of said first and second trays, a pump and connections for recirculating said toner material along a path defined from said reservoir to said first tray then overflowing into said second tray and returning to said reservoir, said first tray being disposed at a level relative to said web to carry the overflowing toner material into contact with said web portions to develop same, a pair of elongate wiper blades disposed in said second tray in spaced relation to each other and downstream of said first tray intermediate the confronting side walls of said first and second named trays, said blades each including a horizontal edge extending transversely across the path of said web and disposed to remove toner from the web and return the toner directly into said second tray, and a pressure member including a plurality of downwardly depending fingers serving to engage the back surface of said web to confine the travel of said web to move along a generally horizontal path while riding lightly across the upper edges of the walls of said first tray and said edges of said blades.
Claim 2
Dependent Claim
328 words
In an electrostatic printer of a type using a length of record material wrapped to form a supply roll to be fed along a path as a web through a printing station for electrostatically charging discrete portions of said web, apparatus for developing said portions comprising a supply reservoir of liquid toner material, a first elongate tray having relatively thin upwardly disposed walls extending substantially horizontally across the path of said web and lying beneath same, a second elongate tray containing said first tray and encircling the periphery of said first tray, said second tray having relatively thin upwardly disposed walls extending transversely of said web, said transversely extending walls being spaced well clear of the fIrst named said walls to form a catch basin surrounding the first named tray to receive liquid toner material overflowing into the space defined between the walls of said first and second trays, a pump and connections for recirculating said toner material along a path defined from said reservoir to said first tray then overflowing into said second tray and returning to said reservoir, said first tray being disposed at a level relative to said web to carry the overflowing toner material into contact with said web portions to develop same, a pair of elongate wiper blades disposed in said second tray in spaced relation to each other and downstream of said first tray intermediate the confronting side walls of said first and second named trays, said blades each including a horizontal edge extending transversely across the path of said web and disposed to remove toner from the web and return the toner directly into said second tray, and a pressure member including a plurality of downwardly depending fingers serving to engage the back surface of said web to confine the travel of said web to move along a generally horizontal path while riding lightly across the upper edges of the walls of said first tray and said edges of said blades.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |