Classifications

• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/02—Viewing or reading apparatus
  • G02B27/022—Viewing apparatus
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42F—SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
  • B42F17/00—Card-filing arrangements, e.g. card indexes or catalogues or filing cabinets
  • B42F17/18—Card-filing arrangements, e.g. card indexes or catalogues or filing cabinets in which the cards are stored in a flat position
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
  • G03B23/00—Devices for changing pictures in viewing apparatus or projectors
  • G03B23/02—Devices for changing pictures in viewing apparatus or projectors in which a picture is removed from a stock and returned to the same stock or another one; Magazines therefor

Definitions

• the invention relates to a sheet changer for the cyclic Umschich ⁇ th a stack of sheets, for example photo prints, with the features mentioned in the preamble of claim 1.
• a sheet changer * is for example in the publications WO 86/03018, WO 86/03019, WO 86/03021, WO 86/03022, WO 86/03026, WO 86 / - 03028, WO 86/03029 and WO 86/03030 described and illustrated in many details, so that only the most necessary details are given below with regard to details of the function, unless they are essential for the present invention.
• the one frame part is designed as a housing with a viewing window, the other as a slide which can be moved back and forth between stops relative to the housing and parallel to the viewing window plane.
• the frame parts are manufactured from the cheapest possible plastic, for example polystyrene.
• the spring arrangement comprises springs which press the stack against the viewing window.
• wire springs can be arranged in the inner frame part, which are accommodated in a so-called separator web, which forms the inner transverse edge of the inner frame part, and for separating the individual image along the entire extension path against the bottom of the outer surface opposite the window Press the frame part.
• separator web which forms the inner transverse edge of the inner frame part
• the spring forces of the stack pressure arrangement act at least in certain pull-out positions of the frame parts. so that the inner frame part then lies against the outer frame part laterally next to the window with rather high pressure.
• the object of the invention is to design the sheet changer with the features mentioned in the preamble of claim 1 in such a way that it is smooth-running with minimal wear and yet can be produced inexpensively.
• the first frame part in the form of a housing encloses the second frame part in the form of a slide.
• the slide transports the rest of the stack outwards, while the single sheet is held in the housing at that end of the stack which faces away from the viewing window arranged in the housing and is deposited on the window side of the stack when the slide is inserted again.
• the slide has an inner transverse wall in the form of a separator web which overflows the single sheet, which is pressed against the window and thus against the separator web by a pressure system arranged in the housing.
• both the separator web is supported in a rolling manner on the single sheet by means of rollers, that is to say that the slide on its side facing the viewing window is supported against the housing via rollers, because then at least in the effective range of the spring forces the slide is supported on both sides.
• FIG. 1 is a partial sectional view parallel to the viewing window with the slide partially pulled out
• FIG. 2 is a cross section perpendicular to the viewing window plane
• FIG. 3 is a side view of the slide
• FIG. 4 is an enlarged detail from FIG. 3
• FIG. 5 is an enlarged detail from Fig. 2 with more
• Fig. 6 shows schematically in partial section perpendicular to
• FIG. 7 shows the entire slide in perspective
• FIG. 8 shows a detail from FIG. 7, partially broken away
• FIG. 9 shows an alternative slide bearing arrangement.
• the sheet changer or image changer comprises a housing 20 and a slide 22 which can be pulled out and pushed in again. With each complete reciprocation cycle, the bottom sheet of a stack of sheets, for example photo prints, accommodated in the changer is removed and on the viewing window - The end of the stack is deposited, so that the stack is cyclically shifted.
• the viewing window 24 which is made of transparent plastic and is mounted in the housing, namely by two parallel rails 26, each of which is supported by a leaf spring 28 against the housing base 30 opposite the viewing window support.
• the slider 22 comprises a handle bar 32, which has two longitudinal bars 34 with an L-shaped cross section with an inner end bar, the so-called separator 36.
• separator 36 On the side of the separator 36 facing the housing base, two rotatable wheels 40 are embedded in the separator 36 relative to the rails 26; the rails carry an adhesive covering 42 on which the rollers run.
• bearing blocks 44 are integrally formed on the longitudinal spars 34, in each of which a support roller 45 is received. So that the slide can be manufactured by means of injection molding tools that are not too complicated, a slot 46 in the outer wall 48 of the box-shaped bearing block and a groove 50 on the inside extend from the side of the bearing blocks 44 facing the viewing window.
• the bearing pins 52 and 54 of the roller 45 which is made in one piece from plastic, fit into the slot 46 or groove 50 with a sliding fit.
• the material of the roller 45 is preferably polyamide, because this pairing results in low coefficients of friction both where the pins 52 and 54 are received with sliding friction in slot 46 or groove 50 and in the area of the rolling friction between the circumference of the roller 45 and a rail 62 formed on the housing 20 and extending parallel to the direction of extension of the slide.
• this rail can be injection-molded in one piece with the housing or can also be inserted into the upper shell of the housing.
• a non-rotating slide 45a can be provided on the slide, which is made of polyamide or, conversely, itself consists of polystyrene and interacts with a rail made of polyamide.
• the slide is supported with low friction in its "rear” or “inner” area: on the one hand by the rollers 40 downwards, on the other hand by the rollers 45 upwards.
• a low-friction support could also be provided in the front area of the slider, but the slider is only weakly spring-loaded there, so that there is no need.
• the pins 52 protrude so far beyond the outer wall 48 of the bearing blocks 44 that even when the slide is tilted in the extended position, the bearing blocks do not touch the housing-side guides 64 and can thus result in jamming; for the same reason the bearing blocks at the critical ends are chamfered at 70.
• the friction-reducing elements are arranged on the slide, but it goes without saying that they could also be provided on the housing, in particular if a reduction in friction is also desired near the housing opening through which the slide moves.
• At least one of the bearing blocks 44 has a molded-on holder 72 for a stop damper 74 made of felt or the like, which runs onto the inner end edge of the housing when the slide is pulled out (cf. also FIG. 1).
• Tabs 76 protrude upward from the housing base 30 between the downward facing ribs 78 of the slide bars; each of the two tabs 76 also carries a stop damper 80 which, when the slide is inserted, strikes a crosspiece 82 of the slide spar 34 in question.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Sheets, Magazines, And Separation Thereof (AREA)
• Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6340970

Family Applications (1)

Country Status (9)

Family Cites Families (1)

• 1987
  • 1987-11-21 DE DE19873739499 patent/DE3739499A1/de not_active Withdrawn
• 1988
  • 1988-11-14 ZA ZA888502A patent/ZA888502B/xx unknown
  • 1988-11-15 JP JP63509218A patent/JPH02502313A/ja active Pending
  • 1988-11-15 AU AU27845/89A patent/AU2784589A/en not_active Abandoned
  • 1988-11-15 WO PCT/EP1988/001039 patent/WO1989004989A1/de not_active Application Discontinuation
  • 1988-11-15 KR KR1019890701371A patent/KR890702076A/ko not_active Application Discontinuation
  • 1988-11-15 EP EP88910013A patent/EP0343213A1/de not_active Withdrawn
  • 1988-11-15 BR BR888807316A patent/BR8807316A/pt unknown
  • 1988-11-21 ES ES8803548A patent/ES2011518A6/es not_active Expired - Fee Related

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events