US3493310A - Sheet lifter for looseleaf ring binder - Google Patents
Sheet lifter for looseleaf ring binder Download PDFInfo
- Publication number
- US3493310A US3493310A US694540A US3493310DA US3493310A US 3493310 A US3493310 A US 3493310A US 694540 A US694540 A US 694540A US 3493310D A US3493310D A US 3493310DA US 3493310 A US3493310 A US 3493310A
- Authority
- US
- United States
- Prior art keywords
- wing
- binder
- arm
- looseleaf
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42F—SHEETS TEMPORARILY ATTACHED TOGETHER; FILING APPLIANCES; FILE CARDS; INDEXING
- B42F13/00—Filing appliances with means for engaging perforations or slots
- B42F13/40—Filing appliances with means for engaging perforations or slots combined or formed with other articles, e.g. punches, stands
- B42F13/408—Filing appliances with means for engaging perforations or slots combined or formed with other articles, e.g. punches, stands with sheet rests or sheet lifters
Definitions
- a one-piece sheet lifter that can be molded of polyethylene or the like has integral wing portions, arms and pocket portions, the pocket portions being formed to receive rigid tongues that project upwardly from the ring carrier of a binder, and the arms projecting upwardly from inner longitudinal edges of the wings and being connected to the pocket portions by thin, integral hinge portions. Integral ribs flexen and reinforce the junctions of arms and wings.
- This invention relates to looseleaf ring binders and more particularly to sheet lifters (sometimes called leaf flippers) for such ring binders.
- a looseleaf ring binder comprises a spine from which a plurality of rings project upwardly to hold a sheaf of appropriately punched looseleaf sheets, and a pair of cover members that are hingedly connected with the spine along opposite longitudinal edges thereof.
- closure of the cover members causes the sheets to be pinched against the rings by one or both cover members, with the result that portions of the sheets adjacent to each ring hole are subjected to severe frictional Wear.
- a sheet lifter or leaf flipper serves to pick up the sheaf of looseleaf sheets during the initial closing motion of the cover, and in effect carries the sheets around the rings ahead of the swinging cover so that they cannot be pinched between the cover and the rings and thereby damaged.
- Sheet lifters heretofore available have been heavy and rather clumsy, with a number of relatively sharp edges and corners, so that they have substantially increased the weight of ring binders in which they were installed and presented an unattractive appearance.
- those sheet lifters that were functionally satisfactory comprised numerous and rather intricate parts that could be manufactured and assembled only with the expenditure of substantial time and labor, and they were therefore relatively expensive.
- Many of the parts of such prior sheet lifters were made of metal, and, aside from being expensive, such metal parts were subject to rust or corrosion and had sharp corners and edges that were obviously objectionable.
- the general object of the present invention is to provide a sheet lifter or leaf flipper for a looseleaf ring binder that is very light in weight, attractive in appearance and inexpensive to manufacture.
- a more specific object of this invention is to provide a light weight and esthetically satisfactory sheet lifter f the character described which can be molded in one piece from a tough, resiliently exible plastic such as polyethylene, and which will be no less durable and rugged than prior sheet lifters having metal parts but will have n0 sharp corners or edges, will not be subject to rusting or corrosion, and will be substantially less expensive.
- Another specific object of this invention is to provide a very inexpensive sheet lifter of the character described that works very smoothly and quietly and produces none of the clattering and rattling that was characteristic of prior sheet lifters.
- Still another object of this invention is to provide a sheet lifter of the character described wherein the portions thereof that come in contact with the sheets and the inner faces of the covers of the binder are not only smooth and free of sharp corners, but in addition are inherently sleek or slippery so that they slide across the inner faces of the covers without in anywise defacing them as the binder is closed and opened.
- FIGURE 1 is a disassembled fragmentary perspective view of a looseleaf binder and a sheet lifter therefor that embodies the principles of this invention
- FIGURE 2 is a cross sectional view of the binder and sheet lifter in assembled relationship, the binder being shown in open condition;
- FIGURE 3 is a view generally similar to FIGURE 2 but showing the binder with its covers closed;
- FIGURE 4 is a fragmentary sectional view taken on the plane of the line 4 4 in FIGURE 3, but with the looseleaf sheets removed from the binder;
- FIGURE 5 is a fragmentary cross sectional view on an enlarged scale, through one of the pocket portions of the sheet lifter.
- the numeral 5 designates generally a sheet lifter embodying the principles of this invention, for installation in a ring binder 6 of a more or less conventional type.
- the ring binder has an elongated spine 7 from which segmented rings 8 project and has covers 9 that are hingedly connected with the spine along opposite longitudinal edges thereof.
- the rings 8 are mounted at lengthwise spaced intervals along a carrier 10 which overlies the inner face of the spine and which includes well known mechanism (not shown) by which the ring segments are carried for opening and closing motion to permit looseleaf sheets 11 t3 be inserted into the binder and removed therefrom.
- the sheets 0f course have holes near one edge thereof in which the rings are engaged.
- the sheet lifter 5 of this invention is formed in one piece from a tough, resiliently flexible plastic material such as polyethylene, and comprises a pair of opposite plate-like wings 14, a pair of arms 15 projecting upwardly from each wing and integral therewith, and a pair of pocket portions 16, each having an integral hinged connection 18 with an arm 1S on each wing.
- a tough, resiliently flexible plastic material such as polyethylene
- each of the wings 14 is generally rectangular in outline and is adapted to flatwise overlie an inner surface of a cover 9.
- the length of each wing is about equal to that of the carrier 10 on the spine, and its width is substantially less than that 0f the cover it overlies.
- each wing is interrupted by lateral slots 20 in which the rings of the binder are receivable, while an integral rounded rib 21 extends along substantially the entire length of the outer longitudinal edge of the wing, at the underside thereof. Besides stiffening and reinforcing the wings7 these ribs minimize sliding friction between the wings, since they are the only portions of the wings that engage the covers. In this connetion, it should also be noted that inasmuch as the entire lifter is formed of polyethylene, or a similar suitable plastic, the surfaces of the ribs 21 are inherently sleek and slippery. Accordingly, no amount of use will cause the inner faces of the covers to become scratched or other- Wise defaced, as was so often the case in the past.
- Additional integral stiffening ribs 22 can also be formed on the lower surface of each wing, extending parallel to its longitudinal edges, but as shown in FIGURE 3, there is small likelihood that these additional ribs will contact the covers.
- each wing which project upwardly from its inner longitudinal edge, are located near the ends of the wing.
- Each arm can be generally rectangular but preferably tapers upwardly to some extent for the sake of good appearance.
- the arm has a downwardly opening slot 24 that is continuous with an adjacent slot 20 in the wing from which the arm projects.
- the surfaces of each arm are nearly perpendicular to those of its wing, but preferably the included angle between the arm and the Wing is slightly obtuse.
- integral stiifening ribs 26 extend across the underside of the wing and continue around the junction and up the arm, and other integral ribs 28 extend downwardly along the opposite surface of the arm, and terminate at the upper surface of the wing.
- the ribs that extend along both surfaces of each arm increase in depth toward its junction With the wing, to assure that the arm will remain in the proper upright relation to the Wing despite the ilexible nature of the material.
- Each of the pocket portions 16 is connected by the integral hinge means 18 with an arm on each of the two wings, and is adapted to receive a flat, generally rectangular tongue 19 with which it cooperates to hold the sheet lifter in place in the binder.
- the two tongues project upwardly from the ring carrier 10 within the embrace of the rings 8 nearest the ends thereof.
- each pocket portion 16 is rectangular, its width being equal to the width of the tops of the arms 1S that are connected to it.
- the pocket 30 of each of said pocket portions is defined by a pair of side walls 32 that are connected along their upper edges, as at 33, and along their ends, as at 34. The mouths of the pockets thus open downwardly to receive the tongues 19, and preferably the side walls 32 are convexly curved so that they cooperate to snugly grip the tongues as the lifter is assembled with the binder.
- each pocket portion 16 and the two arms 15 that ank it comprise reduced thickness portions of the plastic material, integral with the arms and with the side walls of the pocket portion, each extending across the outer surface of the side wall intermediate the top and bottom edges thereof. Because of the iiexibility of the plastic material of which the sheet lifter is formed, these hinge portions permit the arms to swing freely relative to the pocket portions.
- Installation of the sheet lifter of this invention is readily accomplished by opening the rings of the binder in which it is to be used and moving the sheet lifter straight down with the rings received in its slots until the tongues 19 on the binder are fully received in the pocket portions of the sheet lifter.
- this invention provides a very simple and inexpensive but durable sheet lifter for a looseleaf ring binder which is lighter in weight and much more attractive in appearance than sheet lifters heretofore available, which has no metal parts that might rust, corrode or offer sharp edges or corners to cause injury to persons or property, and which has no tendency to clatter or rattle.
- a unitary sheet lifter of resiliently exible plastic material for preventing binding ybetween the rings and looseleaf sheets thereon as the covers are swung to a closed position, said sheet lifter comprising:
- (D) ri-b means integral with each arm and the wing from which it projects, extending across the junction of the arm and the wing to prevent the arm from being deformed out of an upright position relative to the wing;
- hinge portions connecting the pocket portion with an arm on each wing and each hinge portion being integral with its pocket portion and with the upper end portion of an arm
- each wing being thus connected by its arms to the pocket portions for atwise swinging motion relative to the pocket portions.
- said rib means extending substantially entirely across one face of the wing to stiffen the same transversely
- each wing extending along the outer longitudinal edge thereof to chanen the wing longitudinally.
- a unitary sheet lifter of resiliently flexible plastic material for preventing binding between the rings and looseleaf sheets thereon as the covers are swung to a closed position, said sheet lifter comprising:
- said wings having ring receiving openings in the inner longitudinal edge portions thereof in which the rings of the binder are receivable;
- each arm on the two wings being laterally opposite one another and thus paired, and each arm having a downwardly opening slot therein that opens to an adjacent ring receiving opening in the wing;
- rib means integral with each arm and the wing from which it projects, extending across the junction of the arm and the wing to prevent the arm from being deformed out of an upright position relative to the wing;
- said plate-like Wings having ring receiving openings in the inner longitudinal edges thereof in which the rings of the Vbinder are receivable;
- (C) rib means integral with each arm and the wing from which it projects to chanen the wings and their arms against exure
- said rib means extending across the junction of each arm and its wing to resist displacement of the arm out of an upright position relative to the wing; and (D) centering means integral with and hingedly connecting each pair of arms for atwise swinging motion relative to one another,
- each centering means being freely engageable with and disengageable from a substantially rigid tongue that projects up from the spine of the binder
- each centering means having a downwardly facing wall surface to rest upon the top edge ⁇ of the tongue engaged by the centering means to locate the general axis of the hinge connection between the arms substantially at the center of the binder rings,
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- Sheet Holders (AREA)
Description
Feb. 3, 1970 W ORTH ET AL SHEET METER FOR LoosELEAF RING BINDER 2 Sheets-Sheet l Filed Dec. 29, 1967 Lm 6 Z H. w. oRTH ET Al. 3,493,310
SHEET LIFTER FOR LOOSELEAF RING BINDER Feb. 3, 1970 2 Sheets-Sheet 2 Filed Dec. 29, 196'? l 224 lo i@ m\\\\\\\\\ 35%. 3&3.
This invention relates to looseleaf ring binders and more particularly to sheet lifters (sometimes called leaf flippers) for such ring binders.
A looseleaf ring binder comprises a spine from which a plurality of rings project upwardly to hold a sheaf of appropriately punched looseleaf sheets, and a pair of cover members that are hingedly connected with the spine along opposite longitudinal edges thereof. In the absence of a sheet lifter, closure of the cover members causes the sheets to be pinched against the rings by one or both cover members, with the result that portions of the sheets adjacent to each ring hole are subjected to severe frictional Wear. A sheet lifter or leaf flipper serves to pick up the sheaf of looseleaf sheets during the initial closing motion of the cover, and in effect carries the sheets around the rings ahead of the swinging cover so that they cannot be pinched between the cover and the rings and thereby damaged.
Sheet lifters heretofore available have been heavy and rather clumsy, with a number of relatively sharp edges and corners, so that they have substantially increased the weight of ring binders in which they were installed and presented an unattractive appearance. Moreover, those sheet lifters that were functionally satisfactory comprised numerous and rather intricate parts that could be manufactured and assembled only with the expenditure of substantial time and labor, and they were therefore relatively expensive. Many of the parts of such prior sheet lifters were made of metal, and, aside from being expensive, such metal parts were subject to rust or corrosion and had sharp corners and edges that were obviously objectionable.
The general object of the present invention is to provide a sheet lifter or leaf flipper for a looseleaf ring binder that is very light in weight, attractive in appearance and inexpensive to manufacture.
A more specific object of this invention is to provide a light weight and esthetically satisfactory sheet lifter f the character described which can be molded in one piece from a tough, resiliently exible plastic such as polyethylene, and which will be no less durable and rugged than prior sheet lifters having metal parts but will have n0 sharp corners or edges, will not be subject to rusting or corrosion, and will be substantially less expensive.
Another specific object of this invention is to provide a very inexpensive sheet lifter of the character described that works very smoothly and quietly and produces none of the clattering and rattling that was characteristic of prior sheet lifters.
Still another object of this invention is to provide a sheet lifter of the character described wherein the portions thereof that come in contact with the sheets and the inner faces of the covers of the binder are not only smooth and free of sharp corners, but in addition are inherently sleek or slippery so that they slide across the inner faces of the covers without in anywise defacing them as the binder is closed and opened.
With these observations and objects in mind, the manner in which the invention achieves its purpose will be appreciated from the following description and the accompanying drawings. This disclosure is intended merely to exemplify the invention. The invention is not limited to the particular structure disclosed, and changes can be made therein which lie within the scope of the appended claims without departing from the invention.
The drawings illustrate one complete example of the physical embodiment of the invention constructed according to the best mode so far devised for the practical application of the principles thereof, and in which:
FIGURE 1 is a disassembled fragmentary perspective view of a looseleaf binder and a sheet lifter therefor that embodies the principles of this invention;
FIGURE 2 is a cross sectional view of the binder and sheet lifter in assembled relationship, the binder being shown in open condition;
FIGURE 3 is a view generally similar to FIGURE 2 but showing the binder with its covers closed;
FIGURE 4 is a fragmentary sectional view taken on the plane of the line 4 4 in FIGURE 3, but with the looseleaf sheets removed from the binder; and
FIGURE 5 is a fragmentary cross sectional view on an enlarged scale, through one of the pocket portions of the sheet lifter.
Referring now to the accompanying drawings, the numeral 5 designates generally a sheet lifter embodying the principles of this invention, for installation in a ring binder 6 of a more or less conventional type. The ring binder has an elongated spine 7 from which segmented rings 8 project and has covers 9 that are hingedly connected with the spine along opposite longitudinal edges thereof.
The rings 8 are mounted at lengthwise spaced intervals along a carrier 10 which overlies the inner face of the spine and which includes well known mechanism (not shown) by which the ring segments are carried for opening and closing motion to permit looseleaf sheets 11 t3 be inserted into the binder and removed therefrom. The sheets 0f course have holes near one edge thereof in which the rings are engaged.
In general, the sheet lifter 5 of this invention is formed in one piece from a tough, resiliently flexible plastic material such as polyethylene, and comprises a pair of opposite plate-like wings 14, a pair of arms 15 projecting upwardly from each wing and integral therewith, and a pair of pocket portions 16, each having an integral hinged connection 18 with an arm 1S on each wing.
-Each of the wings 14 is generally rectangular in outline and is adapted to flatwise overlie an inner surface of a cover 9. The length of each wing is about equal to that of the carrier 10 on the spine, and its width is substantially less than that 0f the cover it overlies.
The inner longitudinal edge of each wing is interrupted by lateral slots 20 in which the rings of the binder are receivable, while an integral rounded rib 21 extends along substantially the entire length of the outer longitudinal edge of the wing, at the underside thereof. Besides stiftening and reinforcing the wings7 these ribs minimize sliding friction between the wings, since they are the only portions of the wings that engage the covers. In this connetion, it should also be noted that inasmuch as the entire lifter is formed of polyethylene, or a similar suitable plastic, the surfaces of the ribs 21 are inherently sleek and slippery. Accordingly, no amount of use will cause the inner faces of the covers to become scratched or other- Wise defaced, as was so often the case in the past.
Additional integral stiffening ribs 22 can also be formed on the lower surface of each wing, extending parallel to its longitudinal edges, but as shown in FIGURE 3, there is small likelihood that these additional ribs will contact the covers.
The arms on each wing, which project upwardly from its inner longitudinal edge, are located near the ends of the wing. Each arm can be generally rectangular but preferably tapers upwardly to some extent for the sake of good appearance. The arm has a downwardly opening slot 24 that is continuous with an adjacent slot 20 in the wing from which the arm projects. The surfaces of each arm are nearly perpendicular to those of its wing, but preferably the included angle between the arm and the Wing is slightly obtuse.
To reinforce each arm and its junction with its wing, and to lix the angle between the arm and the wing, integral stiifening ribs 26 extend across the underside of the wing and continue around the junction and up the arm, and other integral ribs 28 extend downwardly along the opposite surface of the arm, and terminate at the upper surface of the wing. The ribs that extend along both surfaces of each arm increase in depth toward its junction With the wing, to assure that the arm will remain in the proper upright relation to the Wing despite the ilexible nature of the material.
Each of the pocket portions 16 is connected by the integral hinge means 18 with an arm on each of the two wings, and is adapted to receive a flat, generally rectangular tongue 19 with which it cooperates to hold the sheet lifter in place in the binder. The two tongues project upwardly from the ring carrier 10 within the embrace of the rings 8 nearest the ends thereof.
AS viewed from the side (see FIGURE 4) each pocket portion 16 is rectangular, its width being equal to the width of the tops of the arms 1S that are connected to it. The pocket 30 of each of said pocket portions is defined by a pair of side walls 32 that are connected along their upper edges, as at 33, and along their ends, as at 34. The mouths of the pockets thus open downwardly to receive the tongues 19, and preferably the side walls 32 are convexly curved so that they cooperate to snugly grip the tongues as the lifter is assembled with the binder.
The hinged connections 18 Vbetween each pocket portion 16 and the two arms 15 that ank it comprise reduced thickness portions of the plastic material, integral with the arms and with the side walls of the pocket portion, each extending across the outer surface of the side wall intermediate the top and bottom edges thereof. Because of the iiexibility of the plastic material of which the sheet lifter is formed, these hinge portions permit the arms to swing freely relative to the pocket portions.
Installation of the sheet lifter of this invention is readily accomplished by opening the rings of the binder in which it is to be used and moving the sheet lifter straight down with the rings received in its slots until the tongues 19 on the binder are fully received in the pocket portions of the sheet lifter.
From the foregoing description taken with the accompanying drawings, it will be readily apparent that this invention provides a very simple and inexpensive but durable sheet lifter for a looseleaf ring binder which is lighter in weight and much more attractive in appearance than sheet lifters heretofore available, which has no metal parts that might rust, corrode or offer sharp edges or corners to cause injury to persons or property, and which has no tendency to clatter or rattle.
What is claimed as our invention is:
1. In a looseleaf binder having a spine on which there are rings for holding a plurality of looseleaf sheets and having covers hingedly connected with the spine, a unitary sheet lifter of resiliently exible plastic material, for preventing binding ybetween the rings and looseleaf sheets thereon as the covers are swung to a closed position, said sheet lifter comprising:
(A) a pair of upright pocket portions, each defining a pocket with a downwardly opening mouth to receive a substantially rigid tongue that projects upwardly from the spine;
(B) a pair of elongated plate-like wings, each having an outer longitudinal edge and an inner longitudinal edge that is interrupted by laterally opening slots in which the rings of the binder are receivable;
(C) a pair of arms integral with each of said wings, projecting upwardly from the wing at its inner edge near opposite ends thereof, each arm having a downwardly opening slot therein that is continuous with a slot in the wing;
(D) ri-b means integral with each arm and the wing from which it projects, extending across the junction of the arm and the wing to prevent the arm from being deformed out of an upright position relative to the wing; and
(E) a pair of thin hinge portions on each pocket portion, at opposite sides thereof,
said hinge portions connecting the pocket portion with an arm on each wing and each hinge portion being integral with its pocket portion and with the upper end portion of an arm,
each wing being thus connected by its arms to the pocket portions for atwise swinging motion relative to the pocket portions.
2. The leaf lifter of claim 1, further characterized by:
said rib means extending substantially entirely across one face of the wing to stiffen the same transversely, and
a rib integral with each wing extending along the outer longitudinal edge thereof to stiften the wing longitudinally.
3. The leaf lifter of claim 2, further characterized in that said ribs which extend along the outer longitudinal edges of the wings have smooth rounded surfaces that project above the outer face of the wings to minimize sliding Contact between the wings and the binder covers.
4. The leaf lifter of claim 1, further characterized in that the pockets defined by said pocket portions have convexly curved sidewalls to cooperate in gripping under yielding bias the rigid tongue received between them.
5. In a looseleaf binder having a spine on which there are rings for holding a plurality of looseleaf sheets and having covers hingedly connected with the spine, a unitary sheet lifter of resiliently flexible plastic material, for preventing binding between the rings and looseleaf sheets thereon as the covers are swung to a closed position, said sheet lifter comprising:
(A) a plurality of upright pocket portions, each defining a pocket with a downwardly opening mouth to receive a substantially rigid tongue that projects upwardly from the spine;
(B) a pair of elongated plate-like wings, each having an outer longitudinal edge and an inner longitudinal edge,
said wings having ring receiving openings in the inner longitudinal edge portions thereof in which the rings of the binder are receivable;
(C) a plurality of arms integral with each of said wings, projecting upwardly from the Wing at its inner edge,
the arms on the two wings being laterally opposite one another and thus paired, and each arm having a downwardly opening slot therein that opens to an adjacent ring receiving opening in the wing;
(D) rib means integral with each arm and the wing from which it projects, extending across the junction of the arm and the wing to prevent the arm from being deformed out of an upright position relative to the wing; and
(E) thin hinge portions integral with the arms connecting each pair of arms with one another and with one of the pocket portions, so that the wings and the arms integral therewith are movable relative to one another and with respect to the pocket portions in compliance with opening and closing movement of the covers of the binder.
6. In a looseleaf binder having a spine on which there are rings for holding a plurality of looseleaf sheets and having covers hingedly connected with the spine, a unitary sheet lifter of resiliently flexible plastic material for preventing binding between the rings and looseleaf sheets thereon as the covers are swung to a closed position, said sheet lifter comprising:
(A) a pair of at elongated plate-like wings, each having an outer longitudinal edge and an inner longitudinal edge,
said plate-like Wings having ring receiving openings in the inner longitudinal edges thereof in which the rings of the Vbinder are receivable;
(B) a pair of arms integral with each of said wings, projecting upwardly therefrom at its inner edge near opposite ends thereof,
the arms on the two wings being laterally opposite one another and thus paired;
(C) rib means integral with each arm and the wing from which it projects to stiften the wings and their arms against exure,
said rib means extending across the junction of each arm and its wing to resist displacement of the arm out of an upright position relative to the wing; and (D) centering means integral with and hingedly connecting each pair of arms for atwise swinging motion relative to one another,
each centering means being freely engageable with and disengageable from a substantially rigid tongue that projects up from the spine of the binder, and
each centering means having a downwardly facing wall surface to rest upon the top edge `of the tongue engaged by the centering means to locate the general axis of the hinge connection between the arms substantially at the center of the binder rings,
the freedom of the centering means to be disengaged from their respective tongues enabling the sheet lifter to be removed from the binder and replaced with another similar sheet lifter Without disturbing the tongues.
References Cited UNITED STATES PATENTS 2,055,095 9/1936 Lotter 129-4 3,019,486 2/1962 Stinson.
3,087,498 4/1963 Vogel.
3,111,949 11/1963 Duncan et al.
3,306,301 2/1967 Mason 129--4 3,366,118 1/1968 Beyer 129-4 JEROME SCHNALL, Primary Examiner
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69454067A | 1967-12-29 | 1967-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3493310A true US3493310A (en) | 1970-02-03 |
Family
ID=24789257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US694540A Expired - Lifetime US3493310A (en) | 1967-12-29 | 1967-12-29 | Sheet lifter for looseleaf ring binder |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3493310A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3591300A (en) * | 1968-08-15 | 1971-07-06 | Lewis R Beyer | Universal sheet lifter |
| US4185934A (en) * | 1978-05-18 | 1980-01-29 | Hodson Hollis C | Filler cradle for looseleaf ringbinders |
| US5549406A (en) * | 1994-11-21 | 1996-08-27 | Cohen; Abner B. | No-bind page lifter clip |
| US20050036825A1 (en) * | 2003-08-14 | 2005-02-17 | Pangburn Daniel Wesley | Ring-center pivot loose-leaf binder page lifter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2055095A (en) * | 1933-11-07 | 1936-09-22 | Ig Farbenindustrie Ag | Recovery of organic acids from oxidation products of hydrocarbons |
| US3019486A (en) * | 1957-12-20 | 1962-02-06 | Phillips Petroleum Co | Method of making plastic hinge |
| US3087498A (en) * | 1962-01-16 | 1963-04-30 | Vogel Rudolf | Holder device |
| US3111949A (en) * | 1958-12-08 | 1963-11-26 | James K Duncan | Rigid-prong self-closing binder |
| US3306301A (en) * | 1966-03-14 | 1967-02-28 | Raynold S Mason | Loose-leaf binder |
| US3366118A (en) * | 1966-08-29 | 1968-01-30 | Lewis R. Beyer | Sheet lifter |
-
1967
- 1967-12-29 US US694540A patent/US3493310A/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2055095A (en) * | 1933-11-07 | 1936-09-22 | Ig Farbenindustrie Ag | Recovery of organic acids from oxidation products of hydrocarbons |
| US3019486A (en) * | 1957-12-20 | 1962-02-06 | Phillips Petroleum Co | Method of making plastic hinge |
| US3111949A (en) * | 1958-12-08 | 1963-11-26 | James K Duncan | Rigid-prong self-closing binder |
| US3087498A (en) * | 1962-01-16 | 1963-04-30 | Vogel Rudolf | Holder device |
| US3306301A (en) * | 1966-03-14 | 1967-02-28 | Raynold S Mason | Loose-leaf binder |
| US3366118A (en) * | 1966-08-29 | 1968-01-30 | Lewis R. Beyer | Sheet lifter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3591300A (en) * | 1968-08-15 | 1971-07-06 | Lewis R Beyer | Universal sheet lifter |
| US4185934A (en) * | 1978-05-18 | 1980-01-29 | Hodson Hollis C | Filler cradle for looseleaf ringbinders |
| US5549406A (en) * | 1994-11-21 | 1996-08-27 | Cohen; Abner B. | No-bind page lifter clip |
| US20050036825A1 (en) * | 2003-08-14 | 2005-02-17 | Pangburn Daniel Wesley | Ring-center pivot loose-leaf binder page lifter |
| US6908248B2 (en) * | 2003-08-14 | 2005-06-21 | Daniel Wesley Pangburn | Ring-center pivot loose-leaf binder page lifter |
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