Patent GB-458091-A (GB)
Title: Improvements relating to paper-feeding equipment for accounting and like machines
IPC: B41J11/54
Filed: 1935-06-11
Abstract: 458,091. Typewriters &c. BURROUGHS ADDING MACHINE CO., 6071,2nd Boulevard, Detroit, Michigan, U.S.A. June 11, 1935, Nos. 16827 and 16828. Convention dates, June 11, 1934 and April 22, 1935. [Class 100 (iv)] Sheet feeding and guiding arrangements ; printing-line indicators.-A front-feed table or the like is normally in position for guiding a sheet into sheet-holding means, such as the platen and feed-rollers when opened, and can be moved to render visible the front of the sheet and to bring a line-feeder into indicating relationship thereto, automatic means being provided for returning the table to normal position when the sheet-holding means is closed. In the mechanism shown in Figs. 1 and 2, the frame 11 of the platen P is pivoted on a shaft 12 which is connected by links 13 to a shaft 14 on the carriage 5, the arrangement enabling the platen to be raised into the position shown by means of a handle 15 preparatory to front insertion of a ledger sheet L. The platen is provided with bands 23 for holding a record sheet J, and with releasable feed-rollers 30 for holding the sheets. A table 41 for the ledger sheet is secured to plates 42 which are pivoted at 43 to laterally adjustable brackets 44 on the front rail 4 of the carriage. The table is normally horizontal, the plates 42 being held in contact with the brackets 44 by springs 45. Adjustable side-guides 48 for the ledger sheet are mounted on one of a pair of stiffening- rods 47 for the table. The table is formed with a slot 60 for indicating the printing line, the right-hand guide 48 having an opening 61 adjacent to the slot. To increase accuracy and to permit of adjustment, the printing-line indicator preferably consists of an adjustable plate 63 which is visible through the slot. The plate is spaced from the table, and is secured thereto by screws 64 passing through slots. When the platen is in raised position and the feed-rollers have been released, the ledger sheet is placed on the table and pushed between the platen and feed-rollers. The table is then moved into vertical position, the ledger sheet being thereby wrapped around and pressed lightly into contact with the platen. The table is retained in vertical position by co-operation of pins 54 on the plates 42 with pivoted catches 53 on the brackets 44. The face of the ledger sheet is then visible, and after adjustment of the ledger sheet with respect to the printing line by the aid of the plate 63, the feed-rollers are restored, and the platen is depressed to normal position. During depression, the platen cooperates with rollers 55, 66, 67 on the table to release the pins 54 from the catches 53, thereby permitting the springs 45 to restore the table to horizontal position. The rollers serve also to prevent the table from smudging the ledger sheet when the platen is being depressed. When the platen is in depressed position, feed-rollers 70, carried by laterally adjustable brackets 71 on the rail 4, hold the ledger sheet in contact with the front of the platen. A guide-plate 80 prevents the ledger sheet from passing beneath the table. A statement sheet may be front-fed with the ledger sheet. In the mechanism shown in Fig. 6, a normally horizontal table 41<1> is supported at the front by arms 42<1> on a rockshaft 43<1> and at the rear by links 46<1> which are longer than the arms. When the table is raised, it assumes the inclined position shown in the Figure, the rear edge being close to the platen P. The table is urged into horizontal position, determined by stop-lugs 48<1> on the links 46<1> by means of a spring 53<1>. When the table is raised, the movement is limited by stop-lugs 47<1> on the arms 42<1>, and by contact of rollers 49<1> on the table with the platen. The table is held in raised position by engagement of a detent 51<1>, pivoted thereon, with a pin 53<1>. The table is provided with adjustable side-guides 51<1> for the sheet, the rear edges of the side-guides extending slightly beyond the table and constituting printing-line indicators. Another indicator 52<1> may be provided for use with sheets on which the typing does not extend to the sides. When the platen is in raised position and the feed-rollers 30 have been released, the sheet is placed on the table and pushed between the platen and feed-rollers. When the table is raised, the sheet is wrapped around the platen and the upper part is exposed so that adjustment with respect to the printing line can be effected by the aid of the members 51<1>, 52<1>. When the platen is again depressed, the table is initially moved, to release the detent 54<1>, by co-operation of the platen with the rollers 49<1>, and the spring 53<1> then restores the table to horizontal position. Specifications 18058/07, 18320/08, 18321/08, and 18322/08, [all in Class 106], are referred to. Paper-supports.-To prevent the platen P, Fig. 6, from being lifted by the impact of the types, the platen-shaft 10 is arranged, when in printing position 1, to abut on a pivoted detent. When the platen is raised to frontfeed position it is moved slightly forwards to release the platen-shaft from the detent. On return of the platen, the detent is automatically swung aside, and is then returned to normal position by a spring.