US3831552A - Fingerprinting apparatus - Google Patents

Fingerprinting apparatus Download PDF

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Publication number
US3831552A
US3831552A US00224025A US22402572A US3831552A US 3831552 A US3831552 A US 3831552A US 00224025 A US00224025 A US 00224025A US 22402572 A US22402572 A US 22402572A US 3831552 A US3831552 A US 3831552A
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US
United States
Prior art keywords
medium
powder
aperture
cavity
magnet
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
Application number
US00224025A
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English (en)
Inventor
G Schmidt
J Smith
L Jones
R Conroy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Identicator Corp
Original Assignee
Identicator Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to BE795110D priority Critical patent/BE795110A/xx
Application filed by Identicator Corp filed Critical Identicator Corp
Priority to US00224025A priority patent/US3831552A/en
Priority to CA162,674A priority patent/CA973358A/en
Priority to DE2305395A priority patent/DE2305395A1/de
Priority to GB550273A priority patent/GB1388812A/en
Priority to FR7304051A priority patent/FR2171149B1/fr
Priority to NL7301671A priority patent/NL7301671A/xx
Priority to BR73901A priority patent/BR7300901D0/pt
Priority to AR246432A priority patent/AR195999A1/es
Priority to IT67247/73A priority patent/IT977727B/it
Priority to CH169473A priority patent/CH568063A5/xx
Priority to JP48015450A priority patent/JPS4891899A/ja
Application granted granted Critical
Publication of US3831552A publication Critical patent/US3831552A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/117—Identification of persons
    • A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
    • A61B5/1172—Identification of persons based on the shapes or appearances of their bodies or parts thereof using fingerprinting

Definitions

  • a fingerprinting apparatus for developing latent fingerprints impressed on the surface of a medium, such as a check.
  • the apparatus comprises a casing having an enclosed cavity formed therein for containing a supply of magnetizable powder.
  • a slot is formed in the upper portion of the casing defining an opening over the cavity.
  • a spring biased cover is mounted over the opening to enclose the cavity and prevent the powder from spilling out during non-use.
  • a folded holder is adapted to receive the medium within the fold.
  • the bottom fold of the holder has an open window formed thereon for displaying the latent fingerprint on the medium.
  • the holder is adapted to be inserted within the slot and under the cover, and is positioned to expose the window directly over the opening of the cavity.
  • a magnet is rotatably mounted within the cavity and includes at least one pole which is adapted to physically contact the powder for attracting a quantity of powder thereon. The pole of the magnet is then rotated upwardly to pass over the opening of the cavity to brush a portion of the powder onto the surface of the medium. A portion of the powder deposited on the magnet adheres to the oils defining the latent fingerprint, but not to portions of the surface devoid of such oils, to produce a visible image of the fingerprint.
  • the magnet is rotated by a gear and arcuate rack drive combination.
  • the arcuate rack is formed on a lever which is pivotally mounted on the sidewall of the casing.
  • a hammer is also pivotally mounted on the sidewall of the casing and is adapted to be cocked and triggered by the lever to strike the holder to shake loose any excess powder deposited on the impressed fingerprint.
  • the present invention relates generally to fingerprinting systems and more particularly to fingerprinting systems utilizing magnetizable powder as the developer.
  • the magnetizable powder is contained in a cavity formed in a casing.
  • Themedium with the latent fingerprint impressed on it is positioned over the cavity with the fingerprint facing the quantity of powder.
  • a cover having a movable magnet mounted thereon is placed over the medium on the side opposite the side of the medium having the fingerprint impressed thereon.
  • the magnet is lowered to a position adjacent the top side of the medium. This proximity of I the magnet causes the powder to be attracted against the bottom surface of the medium and adhere to the fingerprint impression.
  • the magnet and the cover are moved away from the medium and the medium is withdrawn from the-apparatus with the visible image of the fingerprint illustrated thereon.
  • the main shortcoming of the apparatus is that the disposition of the medium between the magnet and the powder reduces the attraction force of the magnet. Consequently, the magnet cannot attract a sufficient amount of powder to the medium to produce a clear and distinguishable print.
  • a magnet is rotatively mounted within the cavity and is adapted to attract and transport a quantity of I the powder for brushing the powderattracted thereto onto the surface of the medium having the latent fingerprint impressed thereon. A portion of the powder adheres to the oils of the latent fingerprint to produce a visible image of the print.
  • a primary advantage of the present invention is that the entire operation is accomplished automatically and cleanly with a minimum of steps. This convenience factor makes the apparatus highly attractive for commercial use.
  • Another important advantage of the present invention is that even though the developing operation is fully automatic, the developed fingerprints are still of a very high quality.
  • FIG. 1 is a perspective view of a fingerprinting apparatus of the present invention
  • FIG. 2 is a sectional view of the fingerprinting apparatus taken along lines 22 of FIG. 1 showing a compartment containing magnetic powder having a magnet rotatively mounted therein;
  • FIG. 3 is a sectional view of the apparatus taken along lines 3-3 of FIG. 2;
  • FIG. 4 is a sectional view of the apparatus taken along lines 4-4 of FIG. l'showing the lever construction
  • FIG. 5 is a sectional view of the apparatus taken along lines 55 of FIG. 4;
  • FIG. 6 is a perspective view of one of the levers
  • FIG. 7 is a sectional view of the apparatus similar to FIG. 4, except that the lever is in a depressed position;
  • FIG. 8 is a perspective view of a folded holder
  • FIG. 9 is an enlarged fragmentary view of the cover assembly with the folder inserted in the apparatus.
  • FIG. 1 shows a fingerprinting apparatus generally indicated by arrow 10,
  • a cover plate 17 is mounted over the outer casing 11 and is supported on two sides and bonded to an L-shaped member 18 integrally formed on the top of the forward end wall 16 and a side wall 19. The other two peripheral sides of the cover plate 17 are unsupported and cooperate with the upper edges of the side wall 20 and rear end wall 21 to form a slot 22 for receiving a folded holder 23.
  • a handle 25 is located at the forward end of the casing and is mounted at both ends onto a pair of levers 27 and 28 respectively.
  • the casing 11 is secured to the base by a pair of threaded bolts 29.
  • the forward half of the base includes a bowl-like structure 31 having a cavity 33 formed therein.
  • the cavity 33 is also formed at its upper half by an opening 35 formed in the casing 11.
  • the cavity 33 is adapted to contain a supply of magnetiizable powder 37.
  • the powder 37 may be of any conventional magnetizable material such as iron, nickel, or the like.
  • the top of the opening 35 and support member 36 is enclosed by a cover 39 which is biased by a spring 41 to keep the cavity 33 enclosed during non-use.
  • An arm 43 is rotatably mounted within the cavity 33 with the outer extremity of the arm supporting a pair of magnets 45. As shown in FIG. 3, the magnet arm 43 is mounted on a shaft 47 which is journaled within a pair of bearings 49. The bearings are mounted within a pair of bores formed by the mating inner walls of the casing 11 and base 13. A pair of pinion gears 53 is integrally mounted on the extremity of the shaft 47 which extends through the inner walls into a pair of lever chambers 55. The lever construction is not shown in FIG. 3 for the sake of clarity.
  • the levers 27 and 28 are pivotally mounted at the rearward end of the chambers 55 to a pair ofjournal bearings 57 formed on the base 13 by means of a shaft 59.
  • the forward extremity of the levers 27 and 28 extend through a pair of vertical slots 15 for supporting the handle 25.
  • Each of the levers 27 and 28 are biasly supported by a coil spring 60 in the upward direction.
  • Each of the levers 27 and 28 further includes an arcuate gear section 61 which is adapted to engage a corresponding pinion gear 53. It is the arcuate movement of the levers 27 and 28 and their gear sectors 61 that rotatingly drives the pinion gear 53.
  • the lever 27 also includes an inwardly extending lug 63 and a trigger 65.
  • the lever 27 also includes a cut out portion 67.
  • the lug 63 is adapted to engage the arm portion 69 of a hammer 71 during downward movement of the lever 27. (See FIG. 7).
  • the arm portion 69 of the hammer 71 is also pivotally supported on the shaft 59.
  • a coil spring 73 is mounted on the base 13 and is adapted to biasingly engage the bottom of the arm portion 69 for biasing the arm portion of the arm upwardly.
  • the upper extremity of the hammer 71 is adapted to extend through an aperture 75 formed in the upper wall or support member 36 of the casing 11.
  • the lower extremity of the hammer also includes a projection 77 which is adapted to engage a shoulder 79 ofa sear 81.
  • the sear 81 is pivotally mounted on an inner wall and includes an arcuate sector 83 and a leg section 85.
  • the leg section 85 includes the shoulder 79 while the arcuate section is adapted to be engaged by the trigger 65.
  • FIGS. 1 and 8 show the holder 23 which is preferably made of a folded sheet of plastic with the lower fold having a window 87 formed therein.
  • the holder 23 is adapted to receive and support any medium such as a check in which a latent fingerprint is impressed thereon. A portion of the medium having the fingerprint is adapted to be exposed through the window.
  • the top side of the folder 87 also includes an indented area 89, the function of which will be described hereinafter.
  • a typical example of the utilization of the fingerprinting apparatus 10 is its use by vendors such as department stores, grocery stores, liquor stores, etc. which would utilize fingerprints as a positive means of identification for check cashing purposes. For example, when cashing a check, after the drawer endorses the check, the salesman would take the check and position it into the holder 23, preferably with the back side of the check facing the window 87. After which, the drawer would impress his fingerprint on the portion of the check exposed through the window 87.
  • the holder is then taken and inserted within the slot 22 formed in the apparatus until the forward end contacts the corner formed by the L-shaped member 18. During this movement, the holder 23 contacts the beveled rim 90 of the cover 39 to lift it upwardly to enable the holder 23 to pass therethrough. As more clearly shown in FIG. 9, the holder 23 is positioned such that the indented area 89 fits snugly in an annular portion 91 formed in the cover 39. In this position, the window 87 of the holder 23 which is located on the lower side thereof is mounted directly over the opening 35 of the cavity 33.
  • the handle 25 is then depressed to move the levers 27 and 28 downwardly against the forces of springs 60.
  • This downward movement of the levers 27 and 28 causes their arcuate sectors 61 to rotate the pinion gears 53 in the clockwise direction as shown in FIG. 4.
  • This gear movement is transmitted to the magnet arm 43 to cause the arm to move in the same clockwise direction as shown in FIG. 2.
  • the magnet arm 43 rotates, the extremity thereof containing the magnet 45 passes over the quantity of magnetic powder 37 to attract a portion of the powder 37 to the magnets 45.
  • the magnets 45 are further moved to pass across the opening 35 of the cavity 33 to brush the cluster of powder 37 against the surface of the check.
  • the movement of the lever arm 27 also controls the operation of the hammer 71 to further ensure against any excess powder deposits on the fingerprint.
  • the downward movement of the lever 27 causes the lug 63 to force the hammer arm 69 downw'ardly until the projection 77 engages the shoulder 79 of the sear 81. (See FIG. 7).
  • the sear 81 is caused to fall into that engaging position because of the eccentrically mounted weight formed by the arcuate section 83 thereon. This portion of the sear 81 keeps the hammer 71 in a cocked position until the lever 27 is again permitted to be raised.
  • the upward movement of the lever 27 enables the lug 63 to move away from the hammer arm 69 a sufficient distance so as not to impede its striking movement.
  • the trigger 65 contacts the arcuate sector 63 of the sear 81 to move the sear 81 in a counterclockwise direction as shown in FIG. 4.
  • This rotational movement causes the shoulder 79 to move away from the projection 77 of the hammer 71 to unlock or release the hammer 71.
  • the released hammer 71 is then forced upwardly by the coil spring 73 in a rapid manner to enable the hammer to extend through the aperture 75 to strike the holder 25. This causes any excess powder remaining on the fingerprint to be jarred loose to fall back into the cavity 33.
  • the holder 23 is removed from the apparatus 10 and the check is removed from the holder with the visible fingerprint clearly formed thereon.
  • the entire developing operation of the apparatus 10 is done automatically without the operator touching the magnets or the magnetic powder. All that is required is placing the medium in the holder, inserting the holder within the apparatus, depressing the levers and releasing. The holder is then taken out of the slot and the medium is taken out of the holder with a clear and permanent fingerprint formed thereon. Moreover, the quality of the fingerprint is very high.
  • Another advantage of the apparatus is after the card holder 23 is removed from the slot 21, the cover 39 is biased downwardly onto the opening 35 to enclose the cavity 33 to prevent any powder 37 from spilling.
  • a fingerprinting apparatus for developing a fingerprint impressed on the surface of a medium comprising:
  • a casing having an enclosed cavity formed therein for containing a supply of magnetizable powder, said casing having a slot formed therein defining an opening over said cavity, said slot adapted to receive the medium with the fingerprinted surface facing the opening of said cavity;
  • a magnet movably mounted within said cavity to extend into the portion of the cavity containing the powder and to attract and carry a cluster of powder across the opening of the cavity to enable the powder to contact and adhere to the fingerprint impressed on the medium;
  • jogger means disposed within the casing for. removing excess powder from the medium before the medium is entirely removed from said casing whereby distortion of the fingerprint is prevented;
  • said enclosing means comprises a spring biased cover mounted over the opening, said cover being movable to permit the medium to slide under the cover to extend over the opening.
  • a fingerprinting apparatus for developing a fingerprint impressed on the surface of a medium comprising:
  • a casing having a cavity thereon adapted to contain a supply of magnetizable powder
  • a container in said cavity adapted to hold said supply of magnetizable powder;
  • means for receiving and supporting said medium adjacent said container including an aperture communicating with said container and a slot formed in said casing adapted to receive said medium;
  • means for enclosing said aperture to maintain said magnetizable powder in said container during nonuse including a resiliently biased cover mounted over the aperture in said means for receiving and supporting, said cover extending into said slot;
  • said medium comprising means for forcing said resilient cover away from said aperture, whereby in response to said medium passing under the resiliently biased cover, said cover is moved away from said aperture to a position operatively retaining said medium over said aperture;
  • a magnet movably mounted within said casing, said magnet adapted to attract and brush a quantity of magnetizable powder onto the surface of said medium having the fingerprint impressed thereon.
  • said means for receiving and supporting the medium comprises means for supporting the medium in a horizontal plane.
  • the invention of claim 5 further including means on the housing for removing any excess magnetizable powder from the medium.
  • a fingerprinting apparatus for developing a fingerprint impressed on the surface of a medium comprising:
  • a casing having a cavity therein adapted to contain a supply of magnetizable powder
  • means for receiving and supporting said medium adjacent said container including an aperture communicating with said container;
  • a magnet movably mounted within said container said magnet adapted to attract and brush a quantity of magnetizable powder onto the surface of said medium having the fingerprint impressed thereon;
  • means for moving said magnet including a shaft, at least one lever and a gear on said shaft wherein the shaft is mounted in said container and said lever is capable of moving said shaft through engagement with said gear;
  • means for removing excess powder from said medium including a resiliently biased hammer mounted in said casing;
  • lever comprises means for triggering said hammer as said lever is returning to its initial position.
  • said cocking means comprises a lug mounted on said lever for contacting said hammer to move it against the bias of the spring, and a sear, pivotally mounted on said casing side wall, comprising a shoulder for engaging a projection formed on said hammer.
  • said triggering means comprises a second lug formed on said lever for contacting and pivoting said sear out of engagement with the projection formed on said hammer.
  • the medium capable of retaining the oils of the persons fingerprint comprising:
  • a container mounted in the housing and adapted to hold a supply of magnetizable powder
  • a holder adapted to receive the medium.
  • the holder having an opening to expose the fingerprinted surface of the medium;
  • a support member adapted to supportingly receive the holder and medium therewith and having an aperture communicating with the container whereby at least a portion of the medium with the fingerprinted surface facing the aperture can be operatively exposed to the magnetizable powder in the container;
  • a magnet rotatably mounted within the container to operatively contact the magnetizable powder and carry at least a portion of the powder across the ap erture in the support member to enable the aperture in the support member to enable the magnetizable powder to contact and adhere to the fingerprint impressed on the medium;
  • a cover member connected to the housing and adapted to extend over the support member; and sealing means on the cover member for sealing said aperture and movable in response to entry of said holder and medium therewith whereby to press said holder and medium into a stationary sealing contact with the support member about the aperture whereby the magnetizable powder will only contact the fingerprinted surface of the medium exposed through the aperture and the surplus magnetizable powder will remain in the container.
  • the invention of claim 12 further including means on the housing for removing any excess magnetizable powder from the medium.
  • sealing means on the cover member includes a resilient member that is biased to close the aperture and retain the magnetizable powder when no medium is inserted under the cover member.
  • a fingerprinting apparatus for developing the imprint of a fingerprint that is impressed on a surface of a medium such as a check by a person, the medium capable of retaining the oils of the persons fingerprint comprising:
  • a container member mounted in the housing and adapted to hold a supply of magnetizable powder
  • a support member adapted to supportingly receive the medium and having an aperture communicating the medium with the fingerprinted surface facing the aperture can be operatively exposed to the magnetizable powder in the container;
  • a magnet movably mounted within the container to operatively contact the magnetizable powder and carry at least a portion of the powder across the aperture in the support member to enable the powder to contact and adhere to the fingerprint impressed on the medium;
  • a cover member connected to the housing adapted to extend over the support member and form therewith a slot for receiving the medium
  • said means on the housing for removing any excess powder includes a spring biased hammer pivotally mounted in the housmg.
  • the invention of claim 19 further including means for cocking the hammer as the magnet is rotated to brush powder onto the surface of the medium.
  • said resilient means comprises a spring biased cover mounted over the aperture.
  • a fingerprinting apparatus for developing a fin- 5 gerprint on the surface of a medium comprising:
  • a casing having an enclosed cavity formed therein for containing a supply of magnetizable powder and providing an opening over said cavity;
  • a magnet movably mounted within said cavity to extend into the portion of the cavity containing the powder and to attract and carry a cluster of powder across the opening of the cavity;
  • a casing cover plate portion positioned above the cavity opening and spaced therefrom;
  • a cover located between the cavity and the casing cover plate and normally biased for closing the opening in the cavity in the absence of a medium
  • biasing means extending between the casing cover plate and the cover to effect said bias and yieldable in response to a said medium passing under the cover for sealingly forcing a non-charged said medium carrying oil of a fingerprint to be developed into a fixed position over the opening in said cavity after said medium is in place over said cavity;
  • biasing means includes at least one spring.
  • a fingerprinting apparatus for developing the imprint of a fingerprint that is impressed on a surface of a medium such as a check by a person, the medium capable of retaining the oils of the persons fingerprint comprising:
  • a container mounted in the housing and adapted to hold a supply of magnetizable powder
  • a support member adapted to supportingly receive the medium and having an aperture communicating with the container whereby at least a portion of the medium with the fingerprinted surface facing the aperture can be operatively exposed to the magnetizable powder in the container;
  • a magnet rotatably mounted within the container to operatively contact the magnetizable powder and carry at least a portion of the powder across the aperture in the support member to enable the magnetizable powder to contact and adhere to the fingerprint impressed on the medium;
  • a cover member connected to the housing and adapted to extend over the support member
  • sealing means on the cover member for pressing the medium into a stationary sealing contact with the support member about the aperture whereby the magnetizable powder will only contact the fingerprinted surface of the medium exposed through the aperture and the surplus magnetizable powder will remain in the container, and
  • a holder adapted to receive the medium, the holder having an opening to expose the fingerprinted surface of the medium, the holder capable of moving the sealing means to permit access to the aperture.

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US00224025A 1972-02-07 1972-02-07 Fingerprinting apparatus Expired - Lifetime US3831552A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
BE795110D BE795110A (fr) 1972-02-07 Appareil revelateur d'empreintes digitales
US00224025A US3831552A (en) 1972-02-07 1972-02-07 Fingerprinting apparatus
CA162,674A CA973358A (en) 1972-02-07 1973-02-01 Fingerprinting apparatus
DE2305395A DE2305395A1 (de) 1972-02-07 1973-02-03 Vorrichtung zur entwicklung von latenten fingerabdruecken
GB550273A GB1388812A (en) 1972-02-07 1973-02-05 Finger printing apparatus
NL7301671A NL7301671A (xx) 1972-02-07 1973-02-06
FR7304051A FR2171149B1 (xx) 1972-02-07 1973-02-06
BR73901A BR7300901D0 (pt) 1972-02-07 1973-02-06 Aparelho para impressoes digitais
AR246432A AR195999A1 (es) 1972-02-07 1973-02-06 Aparato dactiloscopico
IT67247/73A IT977727B (it) 1972-02-07 1973-02-06 Dispositivo rivelatore di impronte digitali
CH169473A CH568063A5 (xx) 1972-02-07 1973-02-06
JP48015450A JPS4891899A (xx) 1972-02-07 1973-02-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00224025A US3831552A (en) 1972-02-07 1972-02-07 Fingerprinting apparatus

Publications (1)

Publication Number Publication Date
US3831552A true US3831552A (en) 1974-08-27

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ID=22838986

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Application Number Title Priority Date Filing Date
US00224025A Expired - Lifetime US3831552A (en) 1972-02-07 1972-02-07 Fingerprinting apparatus

Country Status (12)

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US (1) US3831552A (xx)
JP (1) JPS4891899A (xx)
AR (1) AR195999A1 (xx)
BE (1) BE795110A (xx)
BR (1) BR7300901D0 (xx)
CA (1) CA973358A (xx)
CH (1) CH568063A5 (xx)
DE (1) DE2305395A1 (xx)
FR (1) FR2171149B1 (xx)
GB (1) GB1388812A (xx)
IT (1) IT977727B (xx)
NL (1) NL7301671A (xx)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190056A (en) * 1977-10-31 1980-02-26 General Medical Company Method and means for recording sweat gland activity
US4381159A (en) * 1980-11-12 1983-04-26 Sirchie Fingerprint Laboratories, Inc. Magnetic fingerprint dusting brush
US5462597A (en) * 1994-06-30 1995-10-31 Minnesota Mining And Manufacturing System for inkless fingerprinting
EP0738985A2 (en) * 1995-04-21 1996-10-23 Eastman Kodak Company Magnetic fingerprint for secure document authentication
US5879453A (en) * 1997-08-08 1999-03-09 Wallace Computer Services, Inc. System for verifying the identity of an applicant through the use of fingerprints
US5912981A (en) * 1996-08-01 1999-06-15 Hansmire; Kenny Baggage security system and use thereof
US6162485A (en) * 1998-05-07 2000-12-19 Wallace Computers Services, Inc. Fingerprinting system and method
US20140270418A1 (en) * 2013-03-18 2014-09-18 Sunasic Technologies, Inc. Portable device having fingerprint recognition function
CN104107050A (zh) * 2014-07-31 2014-10-22 张琦 指纹粉末自动旋转刷显器
EP3195800A1 (en) 2016-01-21 2017-07-26 European Central Bank Device and method for developing latent fingerprints on a banknote or document
CN109419513A (zh) * 2017-08-28 2019-03-05 大连圣迈新材料有限公司 用于犯罪现场粉末法提取指纹的自动供粉痕检设备及其供粉方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109833046B (zh) * 2019-04-01 2023-04-28 湖南警察学院 一种适于单手操作的磁性刷

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US924934A (en) * 1908-01-20 1909-06-15 Wesel Mfg Company F Etching apparatus.
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US1883535A (en) * 1929-10-07 1932-10-18 Burnett Andre Process for producing on paper or fabric alpha suede-like finish of waterproof property
US2600580A (en) * 1949-06-03 1952-06-17 Haloid Co Electrophotographic apparatus
US2791949A (en) * 1956-02-01 1957-05-14 Haloid Co Xerographic copying device
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US2952241A (en) * 1955-02-03 1960-09-13 Haloid Xerox Inc Developer electrode for electrophotographic apparatus
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US3207129A (en) * 1962-04-17 1965-09-21 Limberger Walter Copying device
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US3316878A (en) * 1965-12-30 1967-05-02 Xerox Corp Cascade developing apparatus
US3318284A (en) * 1964-01-30 1967-05-09 Hitachi Ltd Apparatus for developing electrostatic images of records
US3502052A (en) * 1967-09-06 1970-03-24 Indev Inc Flocking apparatus
US3549397A (en) * 1969-02-03 1970-12-22 World Associates Inc Method for developing finger prints
US3584958A (en) * 1968-09-13 1971-06-15 Indentimation Corp Identification system
US3592675A (en) * 1967-10-09 1971-07-13 Azoplate Corp Method for developing latent electrostatic images

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Publication number Priority date Publication date Assignee Title
US1676020A (en) * 1928-07-03 Fingerprint machine
US924934A (en) * 1908-01-20 1909-06-15 Wesel Mfg Company F Etching apparatus.
US1883535A (en) * 1929-10-07 1932-10-18 Burnett Andre Process for producing on paper or fabric alpha suede-like finish of waterproof property
US2600580A (en) * 1949-06-03 1952-06-17 Haloid Co Electrophotographic apparatus
US2874063A (en) * 1953-03-23 1959-02-17 Rca Corp Electrostatic printing
US2952241A (en) * 1955-02-03 1960-09-13 Haloid Xerox Inc Developer electrode for electrophotographic apparatus
US2791949A (en) * 1956-02-01 1957-05-14 Haloid Co Xerographic copying device
US3207129A (en) * 1962-04-17 1965-09-21 Limberger Walter Copying device
US3202092A (en) * 1963-02-01 1965-08-24 Electrostatic Printing Corp Electrostatic printing system
US3318284A (en) * 1964-01-30 1967-05-09 Hitachi Ltd Apparatus for developing electrostatic images of records
US3316875A (en) * 1964-03-02 1967-05-02 Xerox Corp Xerographic developing apparatus
US3316878A (en) * 1965-12-30 1967-05-02 Xerox Corp Cascade developing apparatus
US3502052A (en) * 1967-09-06 1970-03-24 Indev Inc Flocking apparatus
US3592675A (en) * 1967-10-09 1971-07-13 Azoplate Corp Method for developing latent electrostatic images
US3584958A (en) * 1968-09-13 1971-06-15 Indentimation Corp Identification system
US3549397A (en) * 1969-02-03 1970-12-22 World Associates Inc Method for developing finger prints

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190056A (en) * 1977-10-31 1980-02-26 General Medical Company Method and means for recording sweat gland activity
US4381159A (en) * 1980-11-12 1983-04-26 Sirchie Fingerprint Laboratories, Inc. Magnetic fingerprint dusting brush
US5462597A (en) * 1994-06-30 1995-10-31 Minnesota Mining And Manufacturing System for inkless fingerprinting
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EP3195800A1 (en) 2016-01-21 2017-07-26 European Central Bank Device and method for developing latent fingerprints on a banknote or document
CN109419513A (zh) * 2017-08-28 2019-03-05 大连圣迈新材料有限公司 用于犯罪现场粉末法提取指纹的自动供粉痕检设备及其供粉方法
WO2019041784A1 (zh) * 2017-08-28 2019-03-07 大连圣迈新材料有限公司 用于犯罪现场粉末法提取指纹的自动供粉痕检设备及其供粉方法
CN109419513B (zh) * 2017-08-28 2020-12-08 大连圣迈新材料有限公司 用于犯罪现场粉末法提取指纹的自动供粉痕检设备及其供粉方法

Also Published As

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BR7300901D0 (pt) 1973-10-09
DE2305395A1 (de) 1973-08-16
JPS4891899A (xx) 1973-11-29
FR2171149B1 (xx) 1977-02-04
IT977727B (it) 1974-09-20
CA973358A (en) 1975-08-26
CH568063A5 (xx) 1975-10-31
GB1388812A (en) 1975-03-26
NL7301671A (xx) 1973-08-09
FR2171149A1 (xx) 1973-09-21
AR195999A1 (es) 1973-11-23
BE795110A (fr) 1973-05-29

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