Abstract: A passbook transport and handling apparatus (10) for transporting a passbook between a customer using an automated banking machine and a printer (12) located inside the banking machine includes first belt flights (32) movable on first pulleys (22). The transport further includes second belt flights (34) movable on second pulleys (28). The second belt flights are disposed traversely intermediate of the first belt flights so that a passbook carried therein between is engaged firmly but with limited slippage. The passbook is guided through the transport by a first fixed edge guide (44). A second edge guide (46) is mounted on a spring (48) so as to bias the passbook into alignment as it passes through the transport. A gate member (72) is movable between positions blocking or admitting a passbook to the transport. Movement of the gate member as well as the belt flights is under control of a processor.

Abstract: With a banknote processing apparatus, banknotes stored in a storing section are fed in a feeding direction one by one by take-in rollers. First and second sensors for detecting passage of the banknote are arranged in a direction perpendicular to the feeding direction of the sheets and spaced from each other. A difference between a first passing timing at which a leading edge of the banknote is detected by the first sensor and a second passing timing at which the leading edge of the banknote is detected by the second sensor is detected by a control section. A second difference between a passing timing at which a trailing edge of the banknote is detected by the first sensor and a passing timing at which the trailing edge of the banknote is detected by the second sensor is detected by the control section. If the first and second difference are different from each other, it is determined by the control section that a bent or torn portion exists in the banknote.

Abstract: Method and apparatus for the cancellation of stamps and printing of pre-programmable messages on envelopes. The apparatus comprises structure for feeding a plurality of envelopes in singulated manner to a sensing assembly, which detects the leading and top edges of the envelope and trigger printing structure which cancels the stamp and/or prints on a pre-programmable message. The apparatus and method is of value when envelopes of different sizes, generally having the stamp in a common region, i.e. upper right-hand corner, as part of the plurality of envelopes are present.

Abstract: With a banknote processing apparatus, banknotes stored in a storing section are fed in a feeding direction one by one by take-in rollers. First and second sensors for detecting passage of the banknote are arranged in a direction perpendicular to the feeding direction of the sheets and spaced from each other. A difference between a first passing timing at which a leading edge of the banknote is detected by the first sensor and a second passing timing at which the leading edge of the banknote is detected by the second sensor is detected by a control section. A second difference between a passing timing at which a trailing edge of the banknote is detected by the first sensor and a passing timing at which the trailing edge of the banknote is detected by the second sensor is detected by the control section. If the first and second deference are difference from each other, it is determined by the control section that a bent or torn portion exists in the banknote.

Abstract: An apparatus for removing a sheet from the top of a stack of sheets and transporting it laterally in the direction of a processing station has a pick roller with an arcuate contact surface for frictionally engaging an exposed edge of the top sheet in a stack. The arcuate contact surface transports the sheet laterally at a small downward angle relative to the plane of the top of the stack. The arcuate contact surface contacts the exposed edge so that portions of the arcuate contact surface adjacent the edge extend both above and below the plane of the top of the stack. A dam is located adajcent but spaced from the arcuate contact surface and below the plane of the top of the stack. The dam slidingly engages the sheet edge and the sheet surface opposite the surface engaged by the arcuate contact surface to guide the sheet edge toward the arcuate contact surface.

Abstract: An sheet handling apparatus includes suckers for sucking up a sheet from a sheet storing unit and two sensors which are disposed on the suckers. One of the sensors detects whether the suckers come into contact with the topmost sheet of a sheet stack in the sheet storing unit, and the other sensor detects whether there is a sheet in the sheet storing unit. After the suckers were operated to suck up a sheet, these sensors detect whether the suckers catch the sheet.

Abstract: Two thickness detectors (5) each for outputting an electric signal representing the thickness of a paper sheet (B) passing thereby are arranged side by side in the width direction of a paper sheet conveyance path (3). Parameters such as paper sheet thickness, length, the existence of skew and, if skew exists, the skew angle (.theta.), are calculated based on the output signals from the thickness detectors. This facilitates detection of two or more overlapping bank notes among a wide variety of bank notes having different thicknesses or in case of a bank note having a significantly non-uniform thickness. The correct thickness of a paper sheet is also obtained at all times by using the skew angle and the reference length (W) of the paper sheet. This not only facilitates detection of two overlapping bank notes among a wide variety of bank notes having different thicknesses or in case of a bank note having a significantly non-uniform thickness, but also enables detection to be made very accurately.

Abstract: The skew angle of a sheet (e.g., business form or other document) is detected by providing two sensors spaced from each other a known distance along a straight line perpendicular to the direction of conveyance of the sheet. If there is a skew, the distance travelled by the sheet leading edge between sensings by the sensors is determined, and the skew angle calculated from its tangent. First and second independent drive rollers under the sheet are driven in opposite directions of rotation to compensate for the skew angle. The rollers preferably act in conjunction with a controller (computer) to not only reorient the sheet to compensate for the skew, but also to rotate the document through a significant angle (e.g., 90.degree.) to give the sheet a second orientation different from its initial orientation (e.g., from portrait to landscape).

Abstract: A lift locking assembly for the vertically movable platform in a stacking apparatus includes toothed locking devices at each corner of the platform which are triggered simultaneously into engagement with correspondingly toothed racks by a triggering cable assembly attached in a manner to directly simulate movement of the platform lift chains. The triggering cables always remain taut, but become more highly loaded in tension as a result of platform movement without a corresponding movement in the lift chain or the hydraulic cylinder operating the lift chain, as a result of chain and/or hydraulic system failure. The four locking devices at the corners of the lift platform are interconnected by a common actuating linkage which may also be manually operated to separately lock the lift platform in any desired position for servicing or the like.

Abstract: A system for controlling sheet feed in a sheet-processing machine having a feed table with front stops thereon includes a scanning device in the vicinity of the front stops for detecting an arrival of a sheet thereat. An angle sensor is attached to a shaft of the sheet-processing machine. A computing/control device has a device for assigning scanning signals from the scanning means to respective angular positions .phi.actual with stored setpoint values .phi.setpoint, for computing positioning data for correcting a subsequent arrival of a sheet, if there is a deviation .DELTA..phi. between angular positions .phi.actual and the stored setpoint values .phi.setpoint, and for transmitting the positioning data to an actuating device.

Abstract: A device for selectively turning documents includes first and second drive rollers aligned along an axis which is transverse to a process direction along which documents are fed, and first and second follower rollers cooperatively peripherally aligned with the first and second drive rollers, respectively. One of the drive rollers is operated at a substantially constant peripheral velocity by a first drive which is a constant velocity motor while the other drive roller is operated at a variable peripheral velocity by a variable speed drive so that the document is turned. Thus, only a single variable speed drive, such as, for example a stepper motor or servo system, is required. The variable speed drive is driven through a variable velocity profile to control the amount of rotation of the document. Preferably the document is turned approximately 90.degree..

Abstract: Device for scanning lengths of sheets in a sheet-processing machine, wherein the sheets travel with a leading and a trailing edge, including suction-air measuring nozzles alignable with the trailing edges of the sheets and connected to a suction-air source via control elements connected in an electrical circuit of the machine drive, a feeder for aligning the sheets to be processed at stops for the leading edges of the sheets, lift-type suckers for lifting the sheets individually off a pile of sheets, and have structure defining a scanning hole in at least one of the suction-air measuring nozzles, the one nozzle being disposed in the feeder and being directed towards the trailing edge of an uppermost sheet disposed on a pile of sheets, a suction-air connecting line connecting the one nozzle to the suction-air source, and a differential pressure-measuring valve connected in the line and cooperatively associated with the control elements.

Abstract: Disclosed are Power Encoder means for imprinting MICR characters on checks, with optical check-sensing means disposed along a check-transport path, including optical skew-sensor means including a pair of area-photo-sensor means, one on each side of the check whereby the differential output thereof indicates "degree of skew".

Abstract: A skewing detection mechanism for a printer of type wherein an image is formed onto a continuous recording form. A pivotally movable sensor is arranged in abutted and biased relation to the continuous recording form being transported along a predetermined transport path. A detector is provided for detecting pivotal movement of the sensor.

Abstract: An image forming apparatus passes a photosensitive sheet between a pair of pressure rollers which are normally pressed against each other. A pressure relieving mechanism is provided so as to release the pressure between these rollers if it is detected that the photosensitive sheet is not being properly transported to the pressure rollers such that the operator can remove the cause of the abnormal condition.

Abstract: A method monitors the length of sheets, such as banknotes, passing a predetermined position. The length of a sheet is monitored at two laterally spaced locations, and the difference between the monitored lengths is compared. If the difference is small, this indicates that both monitored lengths are an accurate indication of the length of the sheet. An average of the two monitored lengths is determined and compared with at least one predetermined reference value to determine the acceptability of the sheet. If the average falls within a predetermined range, the sheet is acceptable.

Abstract: A monitor (18,26,28) monitors movement of paper (12) through a printer (16). The paper movement sensors (18,26) comprise one central wheel (70) or a pair of spaced edge wheels (158) each operating an individual photo-optic wheel (164,76). By counting pulses from the photo-optic wheels (76,164) monitor logic (28) determines conditions of jam, over-feeding and skew within the printer (16) both on an instantaneous and on a short term cumulative basis. The system self-calibrates through an initializing routine and later, continuously during operation. Paper movement sensors (18,26) are provided in dust-protected housings which can be chained together to provide monitoring facilities at many points.

Abstract: An apparatus for conveying a base is disclosed which comprises a crosswise base guide for causing a centerline in a conveyance direction of the base to coincide with a centerline in the conveyance direction of the apparatus, a base position detecting sensor for causing the crosswise base guide to start its operation and base breadth detecting sensors for causing the crosswise base guide to stop its operation. The apparatus may further comprise base guide moving mechanism for causing a centerline of the crosswise base guide to coincide with the centerline of the thin film.

Abstract: Apparatus which carries out a method for monitoring the length of sheets (such as banknotes) passing a predetermined position includes two pairs of rollers 1, 2 defining respective nips 5, 6 through which a sheet passes. The passage of a sheet causes radial movement of portions 11 of the rollers 2 which is detected by detectors 12 mounted in a shaft 4. The passage of a sheet causes respective counters 15, 16 to be incremented at a relatively fast sheet. The length of the sheet is determined by monitoring the counter, counters 15 and 16, during the plurality of successive intervals. The leading edge of the sheet appears during the first of the successive intervals and the trailing edge of the sheet appears during the last of the successive intervals.

Abstract: Sheet handling and counting apparatus includes a control system having master and slave processors. The slave processor continuously examining passing sheets to measure sheet length and look for doubles. The slave processor generates outputs representative of jam, doubles error, length error and diagnostics as well as detecting the presence of a check separator for stopping the sheet handling and counting apparatus. The master processor controls the sheet apparatus in accordance with the status signals developed by the slave processor, as well as other data derived from sensors interfaced with the master processor. The master processor transmits a control word to the slave processor to control operation of the length measurement according to one of a plurality of selectable tolerances and to select one of a plurality of operating modes for detecting doubles.

Abstract: A device for monitoring sheet transport at sheet feeders for printing machines includes at least one photo-sensor disposed above at each side, respectively, of the sheet feeder, apparatus for providing adjustable positioning of said photo-sensors in spaced relation to the leading edge and corners of the sheet; control logic responsively connected to the photo sensors for processing signals from the photo-sensor for producing a fault indication in case a sheet feeding failure is detected by the photo-sensors.

Abstract: Apparatus for aligning a sack disposed at the leading end of a series of shingled sacks, which have been unwound from a roll of shingled sacks and which have openings at their leading ends. The sack is aligned by transversely spaced gripping rollers that are operable to align the leading edge of a sack for proper orientation prior to transfer of the sack to a filling apparatus. An intermittently driven conveyor belt conveys the unwound series of shingled sacks as they are unwound from a roll. At least one pressure-applying roller is disposed above the conveyor belt and acts on the leading sack of the series of shingled sacks and cooperates with a backing roller, which is adapted to be driven, and optional pressure-applying elements, which are adapted to be lowered onto the next following sack.

Abstract: The device includes a side wall (13), which leaves open a slot (15) of a variable width relative to a support (11). The flaps of letter envelopes are inserted into the slot (15) angled at 90 degrees, where the letter envelopes rest in a stack on the support (11) and are maintained on their side by the side wall (13). Three sensors (36, 38, 39) serve to provide signals for a motor control of the position of the side wall. The side wall can be manually moved against the force of a spring (26).

Abstract: A machine for separating single plies of fabric from a stack of fabric plies uses a roller provided with a fabric ply engaging mechanism. The roller engages the top ply of fabric and removes it with a rolling action. The engaging mechanism comprises a pivotable rod mounted on the roller and provided with protruding pins which engage the top ply of fabric from the stack as the rod is pivoted. The machine can be arranged to sort alternate plies of fabric from one stack into separate stacks. The machine can be provided with an adjustable support for holding the stack and with a detector for detecting the presence of a single fabric ply on the roller.

Abstract: Transfer and positioning apparatus including a vertically adjustable table, a workpiece introducing belt adapted to slidably move an underlying workpiece into a first location on the table. At the first location, the workpiece is engaged by fingers which depress the table to disengage the workpiece from the belt and subsequently move the workpiece across the table to a second location while changing the direction and orientation of the workpiece. At the second station, the fingers are elevated, allowing an elevation of the table and an engagement of the workpiece with a second belt which in turn slides the workpiece from the table to a second station.

Abstract: A printer having a plurality of differently located feed paths for print material including in each instance a feed channel, has also separately positioned feeler and scanning levers projecting into the respective feed path and channel, in the case of absence of print material in the respective feed path and channel, but the respective lever is pushed out of the channel and feed path in the case of presence of the respective print material; the scanning levers and feelers are linked by a slotted cam plus pin linkage and one of the levers carries a single switch actuating element such as a projector; electric contact making and breaking switching means with three point biased and clamped tongues are actuated by said actuating element to provide a first switching state when print material and sheet stock is in one of said feed paths and channels, independently from the particular channel and feed path involved and providing a second switch state when none of said feed paths and channels includes or contains she

Abstract: A sheet delivery device of the type in which each sheet delivered by a moving suction unit is received and delivered again by feed rolls. The sheet delivery device features a control unit which detects whether or not each sheet is delivered in synchronization with the operation timing of equipment positioned on the downstream side of delivery effected by the feed rolls and sends a signal obtained when no synchronized delivery takes place to a rotation driving unit of the feed rolls to change the revolution speed of the feed rolls thereby to realize the synchronized delivery of each sheet. Oblique delivery of the sheet is corrected by the use of divided, independently rotation controlled pairs of feed rolls.

Abstract: A method of controlling a position of a plate material sheet in a platemaking machine for feeding the plate material sheet in an exposure region and forming a document image on the plate material sheet. A plate material sheet length sensor detects that the plate material sheet to be fed to the exposure region has passed by the sensor. The overall length of the plate material sheet is calculated in accordance with the number of pulses supplied to a plate material sheet drive motor while the plate material sheet length sensor generates an output. Also calculated is a first predetermined number of pulses to be supplied to the plate material sheet drive motor so as to feed the plate material sheet by a first predetermined length within the exposure region.

Abstract: Disclosed herein is a useful device for preventing incorrect transport of copy papers including a paper-detect member which is located in the copy-paper transport path activated by copy paper and a control member, located in advance of the copy-paper transport path and of the paper detect member, which is activated by copy papers to control the pivot motion of paper-detect member.

Abstract: Sheet feeder for a sheet-processing machine having a device for automatically aligning a lateral position of a stack of sheets from which respective sheets to be individually separated are detectable by a conveyor device for transporting the sheets in a given transport direction and feedable to the sheet-processing machine, includes a stack table for carrying the stack of sheets, the stack table being movable transversely to the given transport direction of the sheets, servomotor means for moving the stack table transversely to the given transport direction in response to respective control signals from an actual sheet-position detection device disposed immediately downstream of the sheet stack as viewed in the given transport direction, the detection device having means for detecting the lateral position of the respective sheet just separated from the stack and already fed to the conveyor device.

Abstract: Device for bringing into register a tool mounted on a rotary cylinder for processing products in sheet form, such as a tool for cutting out, creasing, or printing sheets of cardboard in a machine for making and printing corrugated cardboard boxes, comprising a coder (22) providing information representing the theoretical advance of the sheets (10, 11), a coder (23) providing information representing the angle of adjustment given to the tool holder (1), a detector (20) of the passage of a reference mark (15) on the sheet (11) to a point situated upstream of the tool holder, a detector (36) of the theoretical passage of this reference mark at a selected distance slightly downstream of the first detector (20), and a computer (33) supplying correction commands to the correction motor (8) of the tool holder in order that the tool will arrive in phase with the incident sheet (11).

Abstract: A copying machine which takes copies of a draft sheet by slit exposure while it is being conveyed. This copying machine includes a draft correction apparatus. This draft correction apparatus is provided with holding bars attached to a copying machine body so as to turn round the center line of a convey way for the draft, a pair of curved guide plates leaving therebetween a distance sufficient for forming a curved convey way constituting a part of said convey way, at least a pair of solenoids which are attached to the copying machine body on both sides of the draft convey way for turning said holding bars, draft sensors which are provided corresponding to said solenoids on both sides of the center line of the draft convey way this side of the solenoids, and a control means which inputs detection signals from the draft sensors and outputs working signals corresponding thereto against solenoids.

Abstract: An apparatus for feeding sheets such as sheet like documents to be duplicated by an electrophotographic apparatus, said sheet like documents being successively supplied on a document table of the electrophotographic apparatus one by one manual operation of a user, comprises feeding means such as feeding rollers or a feeding belt mechanism, the feeding means being remained inoperative immediately after the supply of sheet, and means for initiating the feeding operation of said feeding means after a margin of time during which the user can correct the position and posture of the sheet.

Abstract: A high speed slitter for slitting large sheets (3) of thin metal into rectangular strips has pairs of rollers (10, 10') mounted on parallel, driven shafts (12, 13). Each roller has a hub (98, 98') carrying a cutter ring (100, 100') with a circular cutting edge (112). A draw ring (92, 92'), cooperating with the opposite cutting ring (100', 100) to draw the sheet between the rollers, consists of a resilient ring (94, 94'), gripping the hub but capable of slipping around it when subjected to sufficient appropriate force, and a steel tire (96, 96'), carried only by the resilient ring and engaging the sheet. The tire can be deflected radially by virtue of the resilient ring.

Abstract: A device for feeding sheets from a supply station aligning the sheets in an X, Y and .theta. coordinates and then gating the sheet into a work station such as the transfer station of a copier. The device includes a pair of independently servo-controlled motors disposed on opposite sides of the sheet. Each motor drives a nip roller which transports the copy sheet. Sensors are disposed to generate signals representative of sheet position in the X, Y and .theta. coordinates. A controller uses the signals to adjust the angular velocity of the motor so that the sheet is squared and is gated onto the work station. The sensors and controller are utilized to measure different parameters associated with the sheet.

Abstract: A sheet supplying apparatus comprising: a pair of supply rollers adapted to be moved into pressure contact with each other to take a sheet into the gap therebetween; a retractable gate member disposed at the inner side of said supply rollers and adapted to retain the leading end of the sheet after the latter is taken into the gap between the supply rollers; and a plurality of detectors disposed between the gate member and the supply rollers. The detectors are arrayed along a line perpendicular to the direction of supply of the sheet to detect the leading end of the sheet. When the leading end of the sheet is detected by all of the detectors, a signal is generated to move the supply rollers into pressure contact while retracting the gate member and, thereafter, to start the rotation of the supply rollers. The time length between the detection of the sheet and the commencement of the supply is shorter for the supply of the second and subsequent sheets than for the first sheet.

Abstract: A sheet member conveying device has a reception port for receiving a sheet member from a previous step, a discharge port for feeding the sheet member to the next step, first conveying means provided near the reception port, second conveying means provided near the discharge port, and sheet member abnormal conveyance detecting means provided near the discharge port to stop the second conveying means when abnormal conveyance of the sheet member has been detected and to continue the operation of the first conveying means for a predetermined time thereafter.

Abstract: A method and apparatus for high-speed in-line or off-line insertion of newspaper supplements and the like into newspaper jackets is disclosed. In in-line insertion, the jackets are indexed and transported through a sensing station where a diverting conveyor takes any jacket that is sensed to be out of position relative to an assembly conveyor carrying pockets. Each pocket receives a jacket and has a fixed side which precedes a pivotal side in the path of travel. The fixed side and the pivotal side are spaced apart at the bottom of the pocket. Adjustable support bars run continuously underneath the pockets bridging the space between pocket sides and support the jacket and insert. The pockets mechanically spread the jackets as the pockets travel downstream, where an insert feeder impels the bottom insert of a stack of inserts into the open pocket. The initial feeding of a jacket, and later feeding of the insert, are sensed photoelectrically.

Abstract: The present invention relates to a process for positioning a supple piece in sheet form on a support surface and to a handling installation applying this process, whereby the piece on the storage support is gripped by two so-called gripping points, these points are displaced along parallel paths above the support surface so that one end of the piece trails on this surface, and each of said gripping points is released independently of each other, as soon as the trailing free edge of the piece passes through a respective point of alignment of the support surface. The invention is particularly applied to the automatic supply of a sewing station.

Abstract: In order to ensure correct registration of printing, a printing device is provided with a transducer arrangement which scans the printing platen to detect one of the edges of the stationary or, in the case of continuous feed stationery, pre-printed markings on the stationery. The scanning may take place in the vertical and/or horizontal directions according to the direction in which precise registration is desired. The transducer arrangement is provided with an associated light source and to avoid errors arising, e.g. from variations in ambient lighting level, the transducer arrangement comprises two sensors which are spaced apart in the direction of scanning and an associated circuit forms a difference signal from the outputs of the sensors, which is discriminated with respect to a predetermined threshold level to produce a signal representative of the edge or marking.

Abstract: An apparatus for positioning a sheet-like original on the feed table of a copying machine comprises a plurality of sensors, mounted on the table, that have different states of response corresponding to the presence or absence of an original at the sensor on the table. The sensors are mounted in pairs, the sensors in each pair being arranged symmetrically with respect to the center line of the feed table that extends parallel to the direction of feed of sheet-like originals. A lateral transport mechanism causes an original, lying ready to be copied, to be displaced in a lateral direction, transverse to the feed direction.

Abstract: A label applicator for an injection moulding machine which includes a suction head for picking up a label, an electrostatic charging device to electrostatically charge the label and means to reverse the suction to transfer the label to the face of a die where it is held by electrostatic forces. The label applicator also includes sensing pins which will actuate a switch to close down the injection moulding machine if the label is not correctly positioned to cover the sensing pins.

Abstract: An electrostatographic type copying or reproduction machine incorporating a programmable controller to operate the various machine components in an integrated manner to produce copies is disclosed herein. The controller carries a master program varying machine operating parameters from which an operating program for the specific copy run desired is formed and used to operate the machine components to produce the copies programmed. As an aide to maintain copy quality and machine reliability, the programmable controller includes diagnostic programs for operating the machine components in a particular manner. For example, the document handler can be thus conditioned to automatically move a document to a preselected location along the paper path to permit inspection for proper document alignment.

Abstract: This invention concerns a photoelectric skew detection system which checks the alignment of rectangular articles travelling on a conveyor. The mechanism comprises four phototransistors (1,2,3, and 4) arranged in a narrow rectangular pattern. Two lamps (8,9) are provided, each lamp illuminating only the two phototransistors forming corners for a narrow dimension of the rectangle. If a trailing edge (6a) of a given rectangular article (6) crosses either of the two forward phototransistors (3,4), both of the two rearward phototransistors (1 and 2) must be lit. If one is not lit, an electrical circuit generates an error signal. In this manner, the mechanism simultaneously detects both skew conditions and a faulty lamp.

Abstract: A monitoring device for missing and skewed sheets in sheet feeding devices on printing machines having feed grippers includes at least two sensors spaced along the width of the feed table for monitoring the front edge of the sheet being fed. The sensors have air outlet means which are disposed to be covered by a transported sheet when the latter is properly aligned.

Abstract: Sheet sensing device in a rotary printing press having a sheet transferring drum provided at respective regions thereof with gripping means for gripping the leading and trailing edges of a sheet being transferred, includes sensing nozzles disposed in the region of the gripping means for gripping the trailing edge of a sheet, a line system connecting the sensing nozzles to a pneumatic pressure-generating source, and pressure monitoring means connected in the line system between the sensing nozzles and the pneumatic pressure-generating source.

Abstract: A copying apparatus includes a copy paper-separating device which separates a copying paper from a rotary drum by engaging the projecting portion from the corresponding end face of the rotary drum by a prescribed width, and a detecting device for detecting whether the projecting portion of the copying paper has a prescribed width, before the copying paper reaches the rotary drum.

Abstract: A device for interrupting the feeding of sheets to a sheet-fed printing press. A feed table is provided having stops to define the registered position of successively fed sheets. After a register interval during which the sheet settles against the stops the sheet is picked up by a gripper cylinder. Photocells are provided for detecting failure of a sheet to register during the register interval. The photocells energize a retaining device on the feed table having a retaining foot which presses downwardly against the non-registered sheet to prevent such sheet from being picked up by the gripper cylinder. A device providing a time delay is interposed ahead of the retaining device to delay operation of the retaining device for a brief time interval to insure that the preceding sheet picked up by the gripper cylinder is clear of the feed table. A latch is provided to maintain the foot in pressing engagement with the sheet, but the foot is resiliently mounted so that an offending sheet may be manually removed.

Abstract: A silkscreen printing machine, having a printing drum supporting material which is to be printed. Sensing means for indicating the position of the material are arranged on the drum, and an adjusting device is arranged to stop the front edge of the material at a predetermined position, in which gripper means grips the material.