EP0230507A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Paper sheet feeding apparatus
Assignee: ZIYAD Inc
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Filing: 1986-07-30
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Granted: —
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Expires: 2006-07-30
Abstract
Abstract A paper sheet feeding apparatus is constructed of paper feed rollers (128, 130; 146) arranged is association with a respective paper tray (120, 122; 140, 156) and adapted to be driven by rotation of a printer platen (104) in a forward paper feeding direction, with selection of the appropriate paper tray from which paper is to be fed, by a combination of forward and reverse rotations of the printer platen (104). The paper feed rollers (128, 130; 146), associated with each of the paper trays (120, 122; 140, 156), are mounted on shafts (124, 126; 144) which extend transversely of the apparatus. A plurality of driven gear assemblies (244, 246; 248) are respectively arranged in operative association with the paper feed rolls (128, 130; 146) and are adapted for lateral sliding movement between engaged and disengaged positions relative to a selector gear (184) whose rotation is synchronized with that of the printer platen (104). In the disengaged position, no drive coupling is provided between the printer platen (104) and the paper feed rollers (128, 130; 146), whereas in the engaged position, the associated paper feed rollers are coupled to the printer platen via its associated driven gear assembly (244, 246; 248) and the selector gear (184). The selector gear (184) is mounted to the apparatus and is adapted to be selectively coupled to the printer platen (104) via means of a spring loaded drive arm (236) selectively engagable with a drive pulley which together transfer rotation from the printer platen (104). In addition to sheets of paper, the paper sheet feeding apparatus accommodates envelopes to be fed from a supply thereof.
Inventors
- 👤 Tadeusz Staniszewski
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 11:38
CPC Classifications
B; B41; B41J; B41J13/00; B41J13/10; B41J13/103; B65; B65H; B65H3/00; B65H3/44; B65H2301/00; B65H2301/40; B65H2301/42; B65H2301/423; B65H2301/4232; B65H2301/42328
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
288 words
Paper sheet feeding apparatus for feeding single sheets of paper or envelopes into a rotating printer platen (104) of a printing device, comprising - a plurality of paper trays (120, 122; 140, 156) for storing a plurality of individual sheets of papers or envelopes, - a plurality of paper feed rollers (128, 130; 146) mounted on transversely extending shafts (124, 126; 144) and associated with the different paper trays (120, 122; 140, 156), - transmission means for selectively transmitting rotational movement of said printer platen (104) to said paper feed rollers (128, 130; 146), the transmission means comprising drive means (178, 184) coupled to said printer platen (104) for rotation therewith and a plurality of driven gear assemblies (244, 246; 248) coupled to said feed rollers (128, 130; 146) and adapted for selective coupling to said drive means (178, 184) in response to rotation of said printer platen (104), characterized in that said transmittion means is constructed to selectively arrange said driven gear assemblies (244, 246; 248) in an engaged position with said drive means (178, 184) upon rotation of said printer platen (104) in a direction opposite to the paper advancing direction and selectively arranging said driven gear assemblies (244, 246; 248) in a disengaged position with respect to said drive means (178, 184) upon continued rotation of said printer platen (104) in said opposite direction, whereby individual sheets of paper are fed from a desired one of said paper trays (120, 122; 140, 156) upon selective engagement of the corresponding driven gear assembly 244, 246; 248) as a result of rotation of said printer platen (104) in said opposite direction (244, 246; 248) and subsequent rotation of said printer platen (104) in a paper advancing direction.
Claim 2
Dependent Claim
288 words
Paper sheet feeding apparatus for feeding single sheets of paper or envelopes into a rotating printer platen (104) of a printing device, comprising - a plurality of paper trays (120, 122; 140, 156) for storing a plurality of individual sheets of papers or envelopes, - a plurality of paper feed rollers (128, 130; 146) mounted on transversely extending shafts (124, 126; 144) and associated with the different paper trays (120, 122; 140, 156), - transmission means for selectively transmitting rotational movement of said printer platen (104) to said paper feed rollers (128, 130; 146), the transmission means comprising drive means (178, 184) coupled to said printer platen (104) for rotation therewith and a plurality of driven gear assemblies (244, 246; 248) coupled to said feed rollers (128, 130; 146) and adapted for selective coupling to said drive means (178, 184) in response to rotation of said printer platen (104), characterized in that said transmittion means is constructed to selectively arrange said driven gear assemblies (244, 246; 248) in an engaged position with said drive means (178, 184) upon rotation of said printer platen (104) in a direction opposite to the paper advancing direction and selectively arranging said driven gear assemblies (244, 246; 248) in a disengaged position with respect to said drive means (178, 184) upon continued rotation of said printer platen (104) in said opposite direction, whereby individual sheets of paper are fed from a desired one of said paper trays (120, 122; 140, 156) upon selective engagement of the corresponding driven gear assembly 244, 246; 248) as a result of rotation of said printer platen (104) in said opposite direction (244, 246; 248) and subsequent rotation of said printer platen (104) in a paper advancing direction.
Claim 3
Dependent Claim
86 words
The apparatus of claim 1, characterized in that - said drive means of said transmission means comprises a drive gear (178) which is driven by said printer platen (104) and a central selector gear (184), and - said drive gear assemblies (244, 246; 248) are mounted onto the ends of said shafts (124, 126; 144) of said feed rollers (128, 130; 146) and are constructed for laterally sliding between an engaged and a disengaged position relative to said central selector gear (184) of said drive means.
Claim 4
Dependent Claim
62 words
The apparatus of claim 2, characterized in that said transmission means further includes: - a coupling gear (180) separately rotatable about a shaft (182) common with said selector gear (184), and - a selector gear locking assembly (230) attached to said selector gear (184) for coupling said coupling gear (180) and selector gear (184) together for common rotation about said shaft (182).
Claim 5
Dependent Claim
29 words
The apparatus of claim 3, characterized in that said selector gear locking assembly (230) supports a driven arm (236) biased in an extended operative position by a spring (238).
Claim 6
Dependent Claim
27 words
The apparatus of claim 4, characterized in that said drive arm (236) is provided with a projecting upper end (242) to engage with said coupling gear (180).
Claim 7
Independent Claim
88 words
The apparatus of one of the claims 2 to 5, characterized in that - said selector gear (184) is provided with a profiled cam groove (210) surrounding said shaft (182), and - a cam plate (212) is pivoted to the side frame (118) of the housing of the feeding apparatus opposing to said cam groove (210) about a pivot point (214) and biased by means of a spring (215), said cam plate (212) being provided with a cam follower (216) to be received within said cam groove (120).
Claim 8
Dependent Claim
120 words
The apparatus of claim 6, characterized in that - on the periphery of said selector gear (184) a wedge-shaped selector arm (220) having a camming surface (222) is pivoted about a pivot point (224), - said locking assembly (230) further comprises a pair of diverging ramp-like surfaces (232, 234), and - said driven gear assemblies (244, 246; 248) mounted on said shafts (124, 126; 144) of said feed rollers (128, 130; 146) each are constructed to include a respective driven gear (252, 254; 256) and an axially displaced circumscribing camming flange (258, 260; 262) adapted for engaging with said camming surface (222) of said selector arm (220) or one of said ramp-like surfaces (232, 234) of said locking assembly (230).
Claim 9
Dependent Claim
37 words
The apparatus of claim 7, characterized in that the axial space provided between said driven gears (252, 254; 256) and their respective camming flanges (258, 260; 262) is sufficient to receive, in non-engagement, said selector gear (184).
Claim 10
Dependent Claim
33 words
The apparatus of claim 7 or 8, characterized in that said selector gear (184) includes a peripheral notched segment (186) adapted to receive said ramp-like surfaces (232, 234) of said locking assembly (230).
Claim 11
Independent Claim
50 words
The apparatus of one of the claims 1 to 9, characterized in that said driven gear assemblies (244, 246; 248) include an internal one-way clutch to permit coupled rotation of the paper shafts (124, 126; 144) by means of rotation of their respective driven gear assembly in one direction only.
Claim 12
Dependent Claim
45 words
The apparatus of claim 9 or 10, characterized in that said selector gear (184) includes a plurality of gear teeth adjacent said notched segment (186), a number of said gear teeth having a length shorter than the remainders of said gear teeth within said plurality.
Claim 13
Dependent Claim
41 words
The apparatus of claim 11, characterized in that said number of gear teeth having length at least shorter than the remainder of said gear teeth including a beveled surface thereon to facilitate engagement with said first and second drive gear means.
Claim 14
Independent Claim
61 words
The apparatus of one of claims 7 to 12, characterized in that positioning arms (264) are pivoted adjacent each of said driven gear assemblies (244, 246; 248), each positioning arm (264) being provided with a positioning head (268) adapted for engaging a respective driven gear (252, 254; 256) and with a notch (272) engaging a respective camming flange (258, 260; 262).
Claim 15
Dependent Claim
29 words
The apparatus of claim 13, characterized in that said positioning heads (268) of said positioning arms (264) are biased into engagement with the driven gear assemblies (244, 246; 248).
Claim 16
Independent Claim
28 words
The apparatus of one of the claims 2 to 14, characterized in that said drive gear (178) and said coupling gear (180) are integrally combined with each other.
Claim 17
Independent Claim
34 words
The apparatus of one of the claims 2 to 15, characterized in that driving motion of said drive gear (178) is achieved by a drive belt (188) operatively connected to said printer platen (104).
References Cited (Backward Citations)
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