US3266794A - Timing devices and arrangements - Google Patents

Timing devices and arrangements Download PDF

Info

Publication number
US3266794A
US3266794A US44265665A US3266794A US 3266794 A US3266794 A US 3266794A US 44265665 A US44265665 A US 44265665A US 3266794 A US3266794 A US 3266794A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
article
member
conveyor
driven
engagement member
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
Inventor
Weir Henry John
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.)
BRITISH LAUNDRY MACHINERY COMP
BRITISH LAUNDRY MACHINERY COMPANY Ltd
Original Assignee
BRITISH LAUNDRY MACHINERY COMP
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
Grant date

Links

Images

Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F89/00Apparatus for folding textile articles with or without stapling
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S493/00Manufacturing container or tube from paper; or other manufacturing from a sheet or web
    • Y10S493/937Textile

Description

16, 1966 H. J. WEIR 3,266,794

I TIMING DEVICES AND ARRANGEMENTS Filed March 25. 1965 A TTO/Z NE Y5 United States Patent M 3,266,794 TllMlNG DEVKCES AND ARRANQEMENTS Henry John Weir, Sedhury, Shepstow, England, assignor to British Laundry Machinery Company, Limited, Wembiy Park, Middlesex, England, a British company Filed Mar. 25, 1965, er. No. 442,656

Claims priority, application Great Britain, Apr. 2, 1964,

9 Claims. (Cl. 270-81) The invention relates to timing devices and arrangements for timing a machine operation on an article carried on a conveyor.

Particular application for the invention is found in timing the folding operations in laundry folding machines of the kind having a moving conveyor situated to receive laundry articles as they issue from an ironer. In such machines the articles (usually fiat-work such as sheets, towels etc.) may be folded in one or both of two ways. In the first way the leading edge of the article may be clamped between a pair of jaws, either before or after it reaches the conveyor, and the jaws are raised to allow the remainder of the article to be carried forward on the conveyor. The jaws are then opened to drop the held edge, usually so that it falls on the trailing edge of the article which is thereby folded in half.

The second way of folding is by tucking the article across its width at a predetermined line (half way along the article for folding in half) and inserting the tuck between two contacting rollers which rotate and draw the article through.

Since the conveyor moves rapidly and the folds are required to be made with an accuracy of 1% or so the timing of the clamping of the jaws or the operation of the tucking device is critical. These machine operations can be initiated by photo-electric devices or mechanical microswitches in the conveyor bed and responsive to the passage of the article to be folded. It is inconvenient, however, to arrange these devices at the place where the folding operation is to be performed. Thus it is desirable to arrange a switch device ahead of the folding position and have a delay between the actuation of the switch device and the operation of the folding device. Timing delay devices hitherto proposed for this purpose have included electronic and electro-mechanical devices which have been complex, unreliable and suffered from the further disadvantage that the delay was not related to the article speed. Thus unless complicated precautions were taken to en sure a constant machine speed despite variable loading, errors resulted. One object of the present invention to overcome these disadvantages.

Where, in the second-mentioned way of folding articles, the lengths of the articles to be folded are unknown and may vary from one to the next it is necessary to determine the appropriate delay in accordance with the length of the article. The present invention further seeks to provide a simple device for performing this additional function, the use of which does not necessitate extensive measures to stabilise the speed of the conveyor.

According to one aspect of the invention there is provided a timing device for timing a machine operation on the half-way point of an elongate article of unknown length carried on a conveyor wherein there are two sensors, one being adapted to give an output signal in response to the passage past one point of the trailing edge of the article, and the other sensor being adapted to give an output signal in response to the passage past another point, further along in the direction of travel of the article, of the leading edge of the article, the device comprising first and second drive members driven to rotate in synchronism with the conveyor; first and second engagement 3,2653% Patented August 16, 1966 members engageable respectively and independently with the peripheries of the first and second drive members to be driven in the same direction as each other, the second engagement being driven by the second drive member at twice the speed of the first engagement member when driven by the first drive member; means for engaging the first engagement member with the first drive member in response to the first occurring of two signals, thereby moving the first engagement from a rest position, the second engagement member being then entrained with the ond engagement member being then entrained with the fir first so as to be driven at the same speed thereby; means for engaging the second engagement member with the second drive member in response to the second occurring of said two output signals, and simultaneously disengaging the first engagement member from the first drive member, the first engagement member thereby returning to its rest position; and a switch arranged to be actuated by the second engagement member, when driven far enough, to initiate said machine operation.

Although the invention may be applied to machine operations other than laundry folding a preferred application of the invention is to laundry folding.

According to a further aspect of the invention a timing device arrangement for folding laundry articles comprises a conveyor having a belt which is carried forward over the top and back beneath a conveyor drum at one end of the conveyor; a :pair of folding rollers having horizontal axes, arranged one above the other in contact with each other so as to rotate in opposite directions and disposed first beyond said end of the conveyor and slightly below the level of said drum; a horizontal set of fingers opposite the junction of the folding rollers; a solenoid arranged to project the fingers between the rollers on energisation; first and second switches arranged near the upper run of the conveyor to be actuated respectively by the passage of the trailing edge and the passage of the leading edge of the article to be folded, the second switch being nearer said end of the conveyor than the first, each switch giving an output on actuation; first and second drive members driven to rotate in synchronism with the conveyor; first and second engagement members engageable respectively and independently with the peripheries of the first and second drive members to be driven in the same direction as each other, the second engagement member being driven by the second drive member at twice the speed of the first engagement member when driven by the first drive member; means for engaging the first engagement member with the first drive member in response to the first occurring of said output signals, thereby moving the first engagement member from a rest position, the second engagement member being then entrained with the first so as to be driven at the same speed thereby; means for engaging the second engagement member with the second drive member in response to the second occurring of said output signals and simultaneously disengaging the first engagement member from the first drive member, the first engagement member thereby returning to its rest position; and a switch arranged to be actuated by the second engagement member, when driven far enough, to energise said solenoid, the arrangement being such that the article is conveyed over said end of the conveyor to fall between the fingers and the folding rollers and actuation of the solenoid is eifected so that the half-way point of the article is tucked by the fingers between the folding rollers and the article is drawn therethrough.

Preferably the or each drive member is a wheel mounted with its axis horizontal and on engagement with the 'wheel the respective member is moved upwards, the or each engagement member being substantially a sector of a disc pivoted at the disc centre about a horizontal 9 axis, the arcuate edge of the engagement member being engageable with the edge of the respective wheel.

Conveniently the or each engagement member is carried on a 'lever arm pivoted at one end and coupled at the other end with operating means operable to pivot the arm and thereby engage the engagement member with the or each respective drive member. Said operating means may be hydraulic or pneumatic, comprising a cylinder and piston, but is preferably a solenoid.

The second drive member has preferably twice the periphery and, when driven, twice the peripheral speed of the first. The two engagement members are preferably moved by the drive members upwards against their weight and the second engagement member is moved by the first by resting on a part or an extension thereof, the arrangement being such that on engagement of the second engagement member with the second drive member the first engagement member is disengaged from the first drive member and allowed to drop.

There follows a description of two embodiments of the invention made with reference to the accompanying drawings, of which:

FIGURES l and 2 are side and end elevations respectively of a timing device according to the invention; and

FIGURE 3 is a diagram showing further parts, in addition to those of FIGURES 1 and 2, of an arrangement according to the invention.

FIGURES l and 2 show a timing device which ensures that a machine operation is effected on the half-way point of an elongated article. The device is similar to the FIGURE 1 device but has two engagement members constituted by two resin-bonded fabric board members 1a, 1b, each shaped substantially as a sector of a circle, pivoted about a common axis passing through the centers of the circles on which axis lie respective pivots 2a, 2b. Engagement members 1a, 1b are carried respectively on lever arms 3a, 3b which are pivoted respectively at 4a, 4b and coupled at their other ends through springs 5a, 5b with solenoids 6a, 612. On energization of the respective solenoid member 1a or -1b is drawn against the edge of a drive member constituted by a wheel 7a or 7b respectively, the two drive member wheels being mounted on a common axis to rotate together in the direction shown by the arrow in synchronism with the conveyor with which the device is associated, being geared thereto. The conveyor is shown schematically at C and the gearing at G. Wheel 7b is twice the diameter of wheel 7a and member 1b is correspondingly slightly smaller in radius than member 1a. A microswitch 8a is arranged at the upper end of the path of member 1b so that it is actuated by contact therewith. The starting point for the members 1a and 1b is determined by an adjustable stop 9a on which they normally rest.

On energisation of solenoid 6a member 1a engages wheel 7a and is drawn upwards and the arrangement is such that member 1b is also drawn upwards at the same rate. This is effected by a laterally extending pin 10 mounted in member 1a and accommodated in a recess 11 in member 1b. This arrangement is not reciprocal in that if solenoid 6b is energised only member 1b is drawn upwards, and this at twice the speed that member 1a is drawn upwards.

A typical operating sequence for the arrangement of FIGURES 2 and 3 will be described in conjunction with its application to an arrangement for folding laundry articles in 'half, FIGURE 4 showing schematically the relevant parts of such an arrangement. With reference to FIGURE 4 the machine has a conveyor 12 continuously moving in the direction indicated by the arrow on the conveyor wheel 13. The article 14 to be folded is allowed to roll off the conveyor and hang before two counter rotating and contacting rollers 15. When the half-way point of the article is mid-way between the rollers 15 a solenoid 16 is energised to poke forward an appropriately positioned ticking plate 17 and thereby tuck the mid-line of the article between the rollers 15. The article is thereby drawn, folded, between the rollers.

To effect the timing of energisation of solenoid 16 for an article of unknown length the device of FIGURES 2 and 3 is used in conjunction with two micro-switches 18, 19 situated over the conveyor and actuated respectively by the passage of the leading edge and the passage of the trailing edge of the article. The spacing between switches 18 and 19 is half the maximum length of an article which the machine is designed to fold and the distance in the path of the articles from the switch 18 to the folding part at plate 17 is as short as practicable. In an arrangement as shown where the articles come in part off the conveyor before folding this latter distance may be typically 6 and the distance between switches 18 and 19 2 ft., thereby catering for articles of maximum length 4 ft.usually 8 ft. sheets already folded in half.

When the leading edge of the article passes switch 19 nothing happens except that it is ensured that the circuitry is set for operation. Passage of the leading edge past switch 18 actuates this switch which thereby energises solenoid 6a (FIGURE 2). Members 1a and 1b move upwards at a speed proportional to the conveyor speed. When the trailing edge of the article passes switch 19 this switch is actuated and solenoid 6b energised and solenoid 6a simultaneously de-energised thereby. Member 1b thus further proceeds upwards on its own at twice its former speed, still in proportion to the conveyor speed. Finally member 1b strikes the microswitch 8a which energises solenoid 16 and effects the folding operation. Solenoid 6b is de-energised and member 1b allowed to drop. The distance between stop 9a and switch 8a is so adjusted that solenoid 16 is energised as the half-way point of the article passes plate 17.

Switches 18 and 19 and solenoids 6a and 6b are interconnected in such a way that the first one which is actuated energises solenoid 6a and the other one de-energises solenoid 6a and simultaneously energises solenoid 6b (it being remembered that actuation of switch 19 is by the trailing edge and not the leading edge of the article). In this way the measuring and delay operation above described is effected even for articles which are less in length than the distance between switches 18 and 19.

The interlocking of the members '14: and 1b by pin 10 and recess 11 offers the advantage that member 1a can be dropped to its starting position before member 1b has finished the measuring and delay operation and thus before the article has been folded. This allows the measurement of the next article by upward movement of member 1a to begin even before the preceding article is folded and so allows for rapid processing of articles. When the folding operation has been initiated for the preceding article the member 1b is dropped only to the position of member 1a and the measuring operation for the next article proceeds as normal.

The invention is not restricted to the details of the foregoing description with reference to the drawings. For example, the movable members need not be sector shaped but may be slides mounted to slide up the lever arms by contact with the rotary wheel. Interlocking in this cas may be by an arm from one member projecting underneath the other. The lever arms need not be operated by solenoids, but by hydraulic or pneumatic pistons and cylinders, the switch or trigger devices on the conveyor bed being appropriate to the system used, and the return of the members to the start position need not be by gravity but instead springs may be provided if it is desired to mount the members to move horizontally. The drive members may be constituted by, instead of wheels, moving belts.

I claim:

1. A timing device for timing a machine operation on the half-way point of an elongate article of unknown length carried on a conveyor wherein there are two sensors, one being adapted to give an output signal in response to the passage past one point of the trailing edge of the article, and the other sensor being adapted to give an output signal in response to the passage past another point, further along in the direction of travel of the article, of the leading edge of the article, the device comprising first and second drive members driven to rotate in synchronism with the conveyor; first and second engagement members engageable respectively and independently with the peripheries of the first and second drive members to be driven in the same direction as each other, the second engagement member being driven by the second drive member at twice the speed of the first engagement member when driWen by the first drive member; means for engaging the first engagement member with the first drive member in response to the first occurring of two of said output signals, thereby moving the first engagement member from a res-t position, the second engagement member being then entrained with the first so as to be driven at the same speed thereby; means for engaging the second engagement member with the second drive member in response to the second occurring of said two output signals, and simultaneously disengaging the first engagement member from the first drive member, the first engagement member thereby returning to its rest position; and a switch arranged to be actuated by the second engagement member, when driven far enough, to initiate said machine operation.

2. A timing device arrangement for holding laundry articles, the arrangement comprising a conveyor having a belt which is carried forward over the top and back beneath a conveyor drum at one end of the conveyor, a pair of folding rollers having horizontal axes, arranged one above the other in contact with each other so as to rotate in opposite directions and disposed just beyond said end of the conveyor and slightly below the level of said drum; a horizontal set of fingers opposite the junction of the folding rollers; a solenoid arranged to project the fingers between the rollers on energisation; first and second switches arranged near the upper run of the conveyor to be actuated respectively by the passage of the trailing edge and the passage of the leading edge of the article to be folded, the second switch being nearer said end of the conveyor than the first, each switch giving an output on actuation; first and second drive members driven to rotate in synchronism with the conveyor; first and second engagement members engageable respectively and independently with the peripheries of the first and second drive members to be driven in the same direction as each other, the second engagement member being driven by the second drive member at twice the speed of the first engagement member when driven by the first drive member; means for engaging the first engagement member with the first drive member in response to the first occurring of said output signals, thereby moving the first engagement member from a rest position, the second engagement member being then entrained with the first so as to be driven at the same speed thereby; means for engaging the second engagement member with the second drive member in response to the second occurring of said output signals and simultaneously disengaging the first engagement member from the first drive member, the first engagement member thereby returning to its rest position; and a switch arranged to be actuated by the second engagement member, when driven far enough, to energise said solenoid, the arrangement being such that the article is conveyed over said end of the conveyor to fall between the fingers and the folding rollers and actuation of the solenoid is effected so that the half-way point of the article is tucked by the fingers between the folding rollers and the article is drawn therethrough.

3. A device as claimed in claim 1 in conjunction with a laundry folding machine, said machine operations being a folding operation performed on a laundry article carried on a conveyor of the machine.

4. A device as claimed in claim 1 wherein each drive member is a wheel mounted with its axis horizontal and on engagement with the wheel the respective member is moved upwards.

'5. A device as claimed in claim 4 wherein each engagement member is substantially a sector of a disc pivoted at the disc centre about a horizontal axis, the 'arcuate edge of the engagement member being engageable with the edge of the respective wheel.

6. A device as claimed in claim 5 wherein each engagement member is carried on a lever arm pivoted at one end and coupled at the other end with operating means operable to pivot the arm and there-by engage the engagement member with each respective drive member.

7. A device as claimed in claim 6 wherein each operating means is a solenoid.

8. A device as claimed in claim 1 wherein the second drive member has twice the periphery and, when driven, twice the peripheral speed of the first.

9. A device as claimed in claim 1 wherein the two engagement members are moved by the drive members upwards against their weight and the first engagement member has an extension thereon, the second engagement member being moved by the first by resting on a part or an extension thereof.

References Cited by the Examiner UNITED STATES PATENTS 2,516,454 7/1950 Doran 270- 2,743,920 5/ 1956 Petre 270-80 3,154,726 10/1964 McClain 27081 EUGENE R. CAPOZIO, Primary Examiner. NELSON M. ELLISON, Assistant Examiner.

Claims (1)

1. A TIMING DEVICE FOR TIMING A MACHINE OPERATION ON THE HALF-WAY POINT OF AN ELONGATE ARTICLE OF UNKNOWN LENGTH CARRIED ON A CONVEYOR WHEREIN THERE ARE TWO SENSORS, ONE BEING ADAPTED TO GIVE AN OUTPUT SIGNAL IN RESPONSE TO THE PASSAGE PAST ONE POINT OF THE TRAILING EDGE OF THE ARTICLE, AND THE OTHER SENSOR BEING ADAPTED TO GIVE AN OUTPUT SIGNAL IN RESPONSE TO THE PASSAGE PAST ANOTHER POINT, FURTHER ALONG IN THE DIRECTION OF TRAVEL OF THE ARTICLE, OF THE LEADING EDGE OF THE ARTICLE, THE DEVICE COMPRISING FIRST AND SECOND DRIVE MEMBERS DRIVEN TO ROTATE IN SYNCHRONISM WITH THE CONVEYOR; FIRST AND SECOND ENGAGEMENT MEMBERS ENGAGEABLE RESPECTIVELY AND INDEPENDENTLY WITH THE PERIPHERIES OF THE FIRST AND SECOND DRIVE MEMBERS TO BE DRIVEN IN THE SAME DIRECTION AS EACH OTHER, THE SECOND ENGAGEMENT MEMBER BEING DRIVEN BY THE SECOND DRIVE MEMBER AT TWICE THE SPEED OF THE FIRST ENGAGEMENT MEMBER WHEN DRIVEN BY THE FIRST DRIVE MEM-
US3266794A 1964-04-02 1965-03-25 Timing devices and arrangements Expired - Lifetime US3266794A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1354364A GB1081871A (en) 1964-04-02 1964-04-02 Improvements relating to timing devices and arrangements

Publications (1)

Publication Number Publication Date
US3266794A true US3266794A (en) 1966-08-16

Family

ID=10024861

Family Applications (1)

Application Number Title Priority Date Filing Date
US3266794A Expired - Lifetime US3266794A (en) 1964-04-02 1965-03-25 Timing devices and arrangements

Country Status (4)

Country Link
US (1) US3266794A (en)
BE (1) BE661984A (en)
DE (1) DE1460852A1 (en)
GB (1) GB1081871A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647201A (en) * 1969-02-21 1972-03-07 Kemp Applic Ltd Machines for folding paper and other sheets
US4619635A (en) * 1985-11-04 1986-10-28 Ranpak Corp. Automatic feed circuit for dunnage converter
US5123889A (en) * 1990-10-05 1992-06-23 Ranpak Corporation Downsized cushioning dunnage conversion machine and cutting assemblies for use on such a machine
US5322477A (en) * 1990-10-05 1994-06-21 Ranpak Corp. Downsized cushioning dunnage conversion machine and packaging systems employing the same
US5749821A (en) * 1995-07-21 1998-05-12 Ranpak Corp. Cushioning conversion system for converting paper stock into cushioning material with a staging area and a pick and place assembly
US5868657A (en) * 1995-06-07 1999-02-09 Ranpak Corp. Cushioning conversion system with accumulator conveyor
US6179765B1 (en) 1998-10-30 2001-01-30 Ft Acquisition, L.P. Paper dispensing system and method
US6311596B1 (en) 1990-10-05 2001-11-06 Ranpak Corp. Cutting assembly for a cushioning conversion machine
US7651455B2 (en) 2004-03-26 2010-01-26 Free Flow Packaging International, Inc. Method for making paper dunnage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3103468C2 (en) * 1981-02-02 1989-02-23 Wilh. Cordes Gmbh & Co, 4740 Oelde, De

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516454A (en) * 1947-12-26 1950-07-25 American Laundry Mach Co Timing device for folding machines
US2743920A (en) * 1952-12-19 1956-05-01 American Laundry Mach Co Proportional measuring timer
US3154726A (en) * 1961-10-12 1964-10-27 Super Laundry Mach Co Folding machine controller

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2516454A (en) * 1947-12-26 1950-07-25 American Laundry Mach Co Timing device for folding machines
US2743920A (en) * 1952-12-19 1956-05-01 American Laundry Mach Co Proportional measuring timer
US3154726A (en) * 1961-10-12 1964-10-27 Super Laundry Mach Co Folding machine controller

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647201A (en) * 1969-02-21 1972-03-07 Kemp Applic Ltd Machines for folding paper and other sheets
US4619635A (en) * 1985-11-04 1986-10-28 Ranpak Corp. Automatic feed circuit for dunnage converter
US5123889A (en) * 1990-10-05 1992-06-23 Ranpak Corporation Downsized cushioning dunnage conversion machine and cutting assemblies for use on such a machine
US5322477A (en) * 1990-10-05 1994-06-21 Ranpak Corp. Downsized cushioning dunnage conversion machine and packaging systems employing the same
US5468208A (en) * 1990-10-05 1995-11-21 Ranpak Corp. Downsized cushioning dunnage conversion machine and packaging systems employing the same
US6311596B1 (en) 1990-10-05 2001-11-06 Ranpak Corp. Cutting assembly for a cushioning conversion machine
US5868657A (en) * 1995-06-07 1999-02-09 Ranpak Corp. Cushioning conversion system with accumulator conveyor
US6475130B1 (en) 1995-06-07 2002-11-05 Ranpak Corp. Cushioning conversion system with stop gate
US5749821A (en) * 1995-07-21 1998-05-12 Ranpak Corp. Cushioning conversion system for converting paper stock into cushioning material with a staging area and a pick and place assembly
US6179765B1 (en) 1998-10-30 2001-01-30 Ft Acquisition, L.P. Paper dispensing system and method
US7651455B2 (en) 2004-03-26 2010-01-26 Free Flow Packaging International, Inc. Method for making paper dunnage

Also Published As

Publication number Publication date Type
BE661984A (en) 1965-08-02 grant
GB1081871A (en) 1967-09-06 application
DE1460852A1 (en) 1969-04-10 application

Similar Documents

Publication Publication Date Title
US3370693A (en) Conveyor arrangements
US3656337A (en) Scale calibration checking device
US3276566A (en) Apparatus for uniform orientation of spinning cops and the like
US2616068A (en) Apparatus for gauging thickness
US2714906A (en) Adjustable gaging device for saws
US3952183A (en) Sheet counting apparatus
US3667664A (en) Apparatus for keeping a state of tension constant on a material web which runs between successive pairs of driving rollers
US8005A (en) He ne y bo o t
US3411683A (en) Web guiding apparatus
US3525872A (en) Radiation sensitive control means for a moving sheet having registration marks
US2693235A (en) Machine for feeding and shearing metal ribbon material
US3927844A (en) Cloth inspection device
US3908881A (en) Centering sensor and controller
US3089695A (en) Folding machine roller adjusting mechanism
US2060511A (en) Pillowcase turner and doffer
US5815963A (en) Apparatus and process for feeding laundry items to a processing unit
US3793775A (en) Sizing device
US3198513A (en) Stacking devices for sheet articles
US3154726A (en) Folding machine controller
US3339914A (en) Laundry folder
US2885763A (en) Compressive shrinking machine
US2742000A (en) Machines for the extrusion of chocolate paste or a similar plastic mass
US2815111A (en) Conveyer centering device
US4375175A (en) Towel cutting machine
US3552743A (en) Machine for feeding pieces of linen onto a conveyor