什么是裹背條(tiao)，裹背條(tiao)是通過皮殼機等機械用于(yu)精裝書(shu)(shu)(shu)本的(de)書(shu)(shu)(shu)脊(ji)部分(fen)，使書(shu)(shu)(shu)貼連(lian)接得(de)更加牢(lao)固。書(shu)(shu)(shu)脊(ji)制作(zuo)弧(hu)長(chang)的(de)計算，本器規(gui)(gui)格依書(shu)(shu)(shu)芯幅面大小(xiao)進行調定，以能將書(shu)(shu)(shu)芯平穩地(di)送進夾書(shu)(shu)(shu)裝置內(nei)(nei)為標(biao)準。入本后(hou)的(de)書(shu)(shu)(shu)冊不斜歪，四(si)角(jiao)垂直地(di)頂齊在夾書(shu)(shu)(shu)裝置的(de)靠(kao)板、側(ce)規(gui)(gui)內(nei)(nei)。裁切尺寸正確一致，其質量要求與規(gui)(gui)格誤差(cha)與一般切書(shu)(shu)(shu)相同。

夾書(shu)(shu)簽絲(si)帶裝置安放在切書(shu)(shu)機與扒圓起脊機之間。即將切完的書(shu)(shu)芯，用分(fen)(fen)本器從中間分(fen)(fen)開，再由輸(shu)放絲(si)帶器將絲(si)帶夾入中心紙書(shu)(shu)芯的中間靠訂縫一(yi)邊。絲(si)帶夾在書(shu)(shu)芯內兩端各留(liu)出粘邊和使用的余地，再經切刀(dao)（剪刀(dao)式）將其(qi)剪斷。

剪斷(duan)后(hou)(hou)的(de)(de)絲(si)(si)帶(dai)，裹背(bei)條(tiao)(tiao)芯(xin)(xin)(xin)部分(fen)(fen)被(bei)下面膠輥著膠、壓實完成夾(jia)書(shu)(shu)(shu)(shu)簽絲(si)(si)帶(dai)過程。書(shu)(shu)(shu)(shu)簽絲(si)(si)帶(dai)的(de)(de)長度(du)與(yu)一般手工(gong)(gong)加工(gong)(gong)長度(du)基(ji)本相同，可依書(shu)(shu)(shu)(shu)冊幅(fu)面長度(du)調定。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)操作及要求(qiu)。書(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)經裁切、夾(jia)粘絲(si)(si)帶(dai)（或不夾(jia)粘絲(si)(si)帶(dai)）后(hou)(hou)，繼續傳送（或翻轉變(bian)位）并做(zuo)90°翻轉，使平放書(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)變(bian)為后(hou)(hou)背(bei)朝上（或朝下）而進入扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)機。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)機的(de)(de)加工(gong)(gong)，其操作分(fen)(fen)為兩步，但機器的(de)(de)結構(gou)是(shi)連在(zai)一起(qi)的(de)(de)，均是(shi)先扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)后(hou)(hou)起(qi)脊(ji)(ji)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)機在(zai)扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)時，由一組（或一對）圓(yuan)(yuan)(yuan)輥，將書(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)壓緊(jin)后(hou)(hou)作相對旋轉動作），使書(shu)(shu)(shu)(shu)背(bei)扒(ba)(ba)(ba)成適當規格圓(yuan)(yuan)(yuan)勢，加工(gong)(gong)成圓(yuan)(yuan)(yuan)背(bei)書(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)書(shu)(shu)(shu)(shu)背(bei)的(de)(de)形狀分(fen)(fen)為圓(yuan)(yuan)(yuan)背(bei)有脊(ji)(ji)、圓(yuan)(yuan)(yuan)背(bei)無脊(ji)(ji)和(he)方背(bei)（或稱平背(bei)）三(san)種。平裝(zhuang)裹背(bei)條(tiao)(tiao)書(shu)(shu)(shu)(shu)刊(kan)的(de)(de)書(shu)(shu)(shu)(shu)脊(ji)(ji)不高出書(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)平面，而精裝(zhuang)書(shu)(shu)(shu)(shu)刊(kan)的(de)(de)書(shu)(shu)(shu)(shu)脊(ji)(ji)一般要高出書(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)的(de)(de)平面。書(shu)(shu)(shu)(shu)脊(ji)(ji)分(fen)(fen)為真脊(ji)(ji)和(he)假脊(ji)(ji)。

真脊(ji)是(shi)利用書(shu)(shu)(shu)(shu)背(bei)上下兩(liang)邊變(bian)形(xing)的弧度高(gao)出(chu)書(shu)(shu)(shu)(shu)芯(xin)平(ping)面；假脊(ji)則是(shi)利用紙板鑲在書(shu)(shu)(shu)(shu)背(bei)后形(xing)成(cheng)的書(shu)(shu)(shu)(shu)脊(ji)，書(shu)(shu)(shu)(shu)脊(ji)的脊(ji)高(gao)等于封面紙板的厚度。方(fang)背(bei)書(shu)(shu)(shu)(shu)芯(xin)。是(shi)指書(shu)(shu)(shu)(shu)芯(xin)的書(shu)(shu)(shu)(shu)背(bei)平(ping)直(zhi)方(fang)正。書(shu)(shu)(shu)(shu)背(bei)不突出(chu)，與平(ping)裝(zhuang)書(shu)(shu)(shu)(shu)刊(kan)的書(shu)(shu)(shu)(shu)背(bei)基本相(xiang)似。

背(bei)(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)上(shang)下環襯互成(cheng)(cheng)直角，由于精(jing)裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)是用(yong)鎖線訂(ding)訂(ding)連，每一(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)(tie)的(de)(de)訂(ding)口(kou)折縫里(li)面都(dou)用(yong)線串過，因此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)(bei)脊(ji)(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)(tie)其它部(bu)分要(yao)厚一(yi)些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)的(de)(de)帖(tie)(tie)數(shu)越多(duo)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)背(bei)(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)其它部(bu)分厚度的(de)(de)差別也越大(da)。所以方(fang)背(bei)(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)的(de)(de)形(xing)式一(yi)般只用(yong)于厚度約為20mm的(de)(de)精(jing)裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)。圓(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。圓(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)又稱(cheng)圓(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)真(zhen)脊(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)(bei)部(bu)呈(cheng)圓(yuan)(yuan)弧形(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)高(gao)起有(you)(you)脊(ji)(ji)壟，堅(jian)硬挺實，這(zhe)種(zhong)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)(bei)的(de)(de)形(xing)式適(shi)合于裝訂(ding)較(jiao)厚的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)，裝上(shang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼后有(you)(you)明顯的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻閱(yue)方(fang)便。目前我國的(de)(de)精(jing)裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)多(duo)采用(yong)這(zhe)種(zhong)圓(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)的(de)(de)加(jia)工形(xing)式。圓(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)無(wu)(wu)脊(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)。圓(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)無(wu)(wu)脊(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)又稱(cheng)圓(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)(bei)假(jia)脊(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)(bei)部(bu)呈(cheng)圓(yuan)(yuan)弧形(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)的(de)(de)厚度相(xiang)同，堅(jian)實挺括，但沒(mei)有(you)(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)(bei)(bei)(bei)條脊(ji)(ji)。這(zhe)種(zhong)形(xing)式的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)，一(yi)般常與軟質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼或塑料壓制而成(cheng)(cheng)的(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼相(xiang)配套。中心(xin)(xin)紙有(you)(you)些機(ji)器(qi)(qi)還(huan)沒(mei)有(you)(you)沖(chong)圓(yuan)(yuan)裝置，即將方(fang)背(bei)(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先進(jin)行沖(chong)圓(yuan)(yuan)加(jia)工，作初步定(ding)型。先根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)厚度和中心(xin)(xin)紙幅面大(da)小調定(ding)好(hao)夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)(qi)及扒圓(yuan)(yuan)輥（或沖(chong)圓(yuan)(yuan)裝置）的(de)(de)規矩，再使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)進(jin)入夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)(qi)內并送到扒圓(yuan)(yuan)輥之間，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)(bei)扒擠成(cheng)(cheng)一(yi)定(ding)圓(yuan)(yuan)勢。